When you choose to invest time into something that might end after a flamewar, it grinds your motivation a bit. It's not life critical, but it's in your mind.
There is drama everywhere: on the Linux kernel, on Github, Python, Systemd,... People are getting annoyed all the time
There is different levels of drama and amount of contributors plus funding though.
Do I fear that the Linux kernel, which is used by pretty much all Fortune 500 companies and has a huge amount of paid devs, will die in a huge flamewar? No!
The same doesn't hold true for someones hobby project though.
And I am well aware, that Linux was a hobby project once, doesn't change a thing about current state though.
Wouldn't base my choice on that at all. Learn it to learn something new and expand your horizon if you want to. Or learn it if you think it's valuable to use in its current state (it is). What some people quab about is irrelevant.