The [Symfony roadmap](https://symfony.com/releases) says that 4.4 is maintained through November 2023 and Symfony 6.0 is maintained through January 2023. https://github.com/phpstan/phpstan-symfony/commit/298f7aee5f36f7d72e575970013b46965456b7f4 removes support for Symfony 4.x including 4.4. https://github.com/phpstan/phpstan-symfony/commit/120d3a8f3b16f79a570e4ef68a96fe9f85186fd1 adds support for Symfony 6.1 but does not include 6.0. It seems premature to remove support for Symfony 4.4. Also, https://github.com/phpstan/phpstan-symfony/commit/a14d467083e8a4ca6860921e68f646831a88260c isn't compatible with Symfony 4.4