The most important downside for me is: I’m looking for some information about an issue I’m having or how to install or configure something and I find none. Because all the people talk behind closed doors and googling etc doesn’t help any more. Only solution is to join every Discord and platform before you start using your software and scrolling trough pages of chat messages.

I’d rather google for an error message and then be directed directly to an issue tracker where people discussed that specific problem.