You don't give up GitHub as long as you're employed in many companies that have accepted it and are looking for information on pretty much most open source software these days. The only thing is to just host your own projects elsewhere. I did this a long time ago because I was unhappy over GitHub's interface. I am realizing further that all I need is a web page and a link on my personal web site. If I really wanted to publish a project, I'd probably find other avenues. I think SourceHut does look nice if I cared enough.
In some cases, "GitHub" has become a required skill in some jobs now (not git, mind you, but _GitHub_). I personally fumbled a little bit when I was asked that - what is it? The CI/CD stuff specifically, or the "using git" part which is the skill? :) I was a bit befuddled.
I have heard from some people that many companies specifically ask for your github profile, in many places only the user tag, not a link which can be changed to gitlab or something else.
So it will effect your job chances, even if the job has nothing to do with managing GitHub.
Thankfully that hasn't happened for me, yet. Or maybe that could be my own selection criteria - an active GitHub account should not be a prerequisite to get any type of computer job. If the hiring manager is serious about me, they can find the URL in my GitHub profile.
In some cases, "GitHub" has become a required skill in some jobs now (not git, mind you, but _GitHub_). I personally fumbled a little bit when I was asked that - what is it? The CI/CD stuff specifically, or the "using git" part which is the skill? :) I was a bit befuddled.