In light of the recent takedown of the youtube-dl project by Github,
Because you don't need to be a weather man to see how the wind is blowing.
that is an irrelevant case. a project that is breaking the law (youtube-dl project) will obviously be removed from anywhere on the internet. but this has nothing to do with bitcoin.
While it's not related with Bitcoin, it shows that the law could be misused since main reason youtube-dl is removed because it's breaking youtube DRM while there are many ways to break youtube DRM such as using OBS (software) or HDMI recorder (hardware).
Fundamentally it's not the code source which is at risk, it's way too decentralized. It's more what's all around it with github... that's what needs to decentralized ASAP ! that should be a crypto wide effort, to have at least 2-3 "decentralized github".
That makes sense, but majority will keep using GitHub because it's easier/more convenient to use. IMO it's more likely Bitcoin development have it's own centralized website/service (just like Linux kernel at
https://www.kernel.org/).