PHP in itself perhaps but I have seen major efforts being put into 5.3 -> 5.6 and 5.6 -> 7.x. One thing that broke badly was phpunit and related libs for mocki

PHP in itself perhaps but I have seen major efforts being put into 5.3 -> 5.6 and 5.6 -> 7.x. One thing that broke badly was phpunit and related libs for mocking etc. This was a very vanilla PHP project by the way, no frameworks etc.