In a new post to his site Fabien Potencier has posted an update about Symfony 4/Flex and what can be expected from this upcoming release.

Symfony 4 is just around the corner. And Symfony Flex is one of the main selling point for the upgrade. Developers love the new philosophy. And a lot of changes happened since my last blog post. Let me recap the recent changes that you might not be aware of. Most of these changes were prompted by feedback from early adopters.

Included in his list are things like the easier use of recepie contributions, Makefile support changes and minimum PHP version requirements. He also links to an upgrade tutorial and a best practices guide to help you get your application and its code prepared for this new release.