diff --git a/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/FrameworkExtension.php b/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/FrameworkExtension.php
index 72d93297c1..74e6cd59f6 100644
--- a/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/FrameworkExtension.php
+++ b/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/FrameworkExtension.php
@@ -1601,6 +1601,7 @@ class FrameworkExtension extends Extension
 
         $version = new Parameter('container.build_id');
         $container->getDefinition('cache.adapter.apcu')->replaceArgument(2, $version);
+        $container->getDefinition('cache.adapter.system')->replaceArgument(2, $version);
         $container->getDefinition('cache.adapter.filesystem')->replaceArgument(2, $config['directory']);
 
         if (isset($config['prefix_seed'])) {
diff --git a/src/Symfony/Bundle/FrameworkBundle/Resources/config/cache.xml b/src/Symfony/Bundle/FrameworkBundle/Resources/config/cache.xml
index e0ada956e7..488cd868f3 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Resources/config/cache.xml
+++ b/src/Symfony/Bundle/FrameworkBundle/Resources/config/cache.xml
@@ -35,16 +35,15 @@
             <tag name="cache.pool" />
         </service>
 
-        <service id="cache.adapter.system" class="Symfony\Component\Cache\Adapter\PhpFilesAdapter" abstract="true">
+        <service id="cache.adapter.system" class="Symfony\Component\Cache\Adapter\AdapterInterface" abstract="true">
+            <factory class="Symfony\Component\Cache\Adapter\AbstractAdapter" method="createSystemCache" />
             <tag name="cache.pool" clearer="cache.system_clearer" />
             <tag name="monolog.logger" channel="cache" />
             <argument /> <!-- namespace -->
             <argument>0</argument> <!-- default lifetime -->
+            <argument /> <!-- version -->
             <argument>%kernel.cache_dir%/pools</argument>
-            <argument>true</argument>
-            <call method="setLogger">
-                <argument type="service" id="logger" on-invalid="ignore" />
-            </call>
+            <argument type="service" id="logger" on-invalid="ignore" />
         </service>
 
         <service id="cache.adapter.apcu" class="Symfony\Component\Cache\Adapter\ApcuAdapter" abstract="true">
diff --git a/src/Symfony/Component/Cache/Adapter/AbstractAdapter.php b/src/Symfony/Component/Cache/Adapter/AbstractAdapter.php
index 4a0e7c386b..0e6970e740 100644
--- a/src/Symfony/Component/Cache/Adapter/AbstractAdapter.php
+++ b/src/Symfony/Component/Cache/Adapter/AbstractAdapter.php
@@ -94,6 +94,10 @@ abstract class AbstractAdapter implements AdapterInterface, CacheInterface, Logg
     }
 
     /**
+     * Returns an ApcuAdapter if supported, a PhpFilesAdapter otherwise.
+     *
+     * Using ApcuAdapter makes system caches compatible with read-only filesystems.
+     *
      * @param string               $namespace
      * @param int                  $defaultLifetime
      * @param string               $version
@@ -101,23 +105,15 @@ abstract class AbstractAdapter implements AdapterInterface, CacheInterface, Logg
      * @param LoggerInterface|null $logger
      *
      * @return AdapterInterface
-     *
-     * @deprecated since Symfony 4.2
      */
     public static function createSystemCache($namespace, $defaultLifetime, $version, $directory, LoggerInterface $logger = null)
     {
-        @trigger_error(sprintf('The "%s()" method is deprecated since Symfony 4.2.', __METHOD__), E_USER_DEPRECATED);
-
         if (null === self::$apcuSupported) {
             self::$apcuSupported = ApcuAdapter::isSupported();
         }
 
-        if (!self::$apcuSupported && null === self::$phpFilesSupported) {
-            self::$phpFilesSupported = PhpFilesAdapter::isSupported();
-        }
-
-        if (self::$phpFilesSupported) {
-            $opcache = new PhpFilesAdapter($namespace, $defaultLifetime, $directory);
+        if (!self::$apcuSupported) {
+            $opcache = new PhpFilesAdapter($namespace, $defaultLifetime, $directory, true);
             if (null !== $logger) {
                 $opcache->setLogger($logger);
             }
@@ -125,14 +121,6 @@ abstract class AbstractAdapter implements AdapterInterface, CacheInterface, Logg
             return $opcache;
         }
 
-        $fs = new FilesystemAdapter($namespace, $defaultLifetime, $directory);
-        if (null !== $logger) {
-            $fs->setLogger($logger);
-        }
-        if (!self::$apcuSupported) {
-            return $fs;
-        }
-
         $apcu = new ApcuAdapter($namespace, (int) $defaultLifetime / 5, $version);
         if ('cli' === \PHP_SAPI && !ini_get('apc.enable_cli')) {
             $apcu->setLogger(new NullLogger());
@@ -140,7 +128,7 @@ abstract class AbstractAdapter implements AdapterInterface, CacheInterface, Logg
             $apcu->setLogger($logger);
         }
 
-        return new ChainAdapter(array($apcu, $fs));
+        return $apcu;
     }
 
     public static function createConnection($dsn, array $options = array())
diff --git a/src/Symfony/Component/Cache/CHANGELOG.md b/src/Symfony/Component/Cache/CHANGELOG.md
index f90ecbf3f2..b5723e4d61 100644
--- a/src/Symfony/Component/Cache/CHANGELOG.md
+++ b/src/Symfony/Component/Cache/CHANGELOG.md
@@ -12,7 +12,6 @@ CHANGELOG
  * added automatic table creation when using Doctrine DBAL with PDO-based backends
  * throw `LogicException` when `CacheItem::tag()` is called on an item coming from a non tag-aware pool
  * deprecated `CacheItem::getPreviousTags()`, use `CacheItem::getMetadata()` instead
- * deprecated the `AbstractAdapter::createSystemCache()` method
  * deprecated the `AbstractAdapter::unserialize()` and `AbstractCache::unserialize()` methods
  * added `CacheCollectorPass` (originally in `FrameworkBundle`)
  * added `CachePoolClearerPass` (originally in `FrameworkBundle`)