> Everything you do needs to be synchronous and almost everything requires a reload.
this is pretty incorrect, you may want to look into the concept of "partials" in SSR.
maybe you meant everything requires a roundtrip ? but SPA would not solve most of the roundtrips necessary in github given many interactions in the github app require authn/authz checks.
would you care getting into more details ?
Also, 'old' github was known to be very fast an reliable and was indeed a ruby on rails SSR app.
Since a few years ago github started to introduce react and more client side logic and it correlates with more issues and more slowness in the frontend. It only correlates, but still.
Early preview here: https://piggy-toss.netlify.app/
The goal is to play with friends, we love this game.