Read through old-ish posts on their maintainer mailing lists. There’s so much snobbery, elitism, and straight-out hostility to anyone from the outside, it reads

Read through old-ish posts on their maintainer mailing lists. There’s so much snobbery, elitism, and straight-out hostility to anyone from the outside, it reads like 8chan. This has changed by now, but the PHP maintainer community before version 7 was a circle jerk of hyper anal trolls.