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This page represent a comparison between Legacy Stack (aka "4.x" stack) vs New Stack (aka "5.x"- or "6.x"-stack) and will be attempted to be kept up to date as new stack matures. Note: Features mentioned on the black list are still available in 5.x, but via legacy kernel so you will need to use "pure legacy" or a mixed setup using "legacy fallbacks".
For list of Symfony features supported out of the box, see here.
Known existing integration (white list):
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