The appeal of GitHub for me is not only in the git hosting, but also in codespaces. It gives me:

    1: An easy way to start a VM
    2: A one-click solution to access it via private https access

So for development, I dont need to dabble with spawning my own Hetzner VM or something. And I also do not have to dabble with getting a temporary domain and DNS so I can set up my own letsencrypt certs and point the domain to that VM.

I can just write an index.html, execute "sudo python -m http.server 80", click the link that then opens to something.app.github.dev and test my new web application.

This is why codespaces make starting a new product idea a thing of like 1 minute instead of 1 hour for me.