Description
With version 4.8 phpunit had required the yaml component but starting with 5.0 they didn't anymore. The phpunit-bridge documentation still says there will be issues: Provides a modified version of PHPUnit that does not embed symfony/yaml nor prophecy to prevent any conflicts with these dependencies.

My prosposal would be deprecate simple-phpunit with 4.4 and remove it with version 5.0. simple-phpunit still has its issues (no extentions possible), lacks behind the latest phpunit versions and the arguments in the documentation are not valid anymore. In the documentation the official installation guide should be referenced.

If simple-phpunit is still required for (symfony) development I would recommend to extract this to another repository. But for end-users it is not really convenient.