Do I want to use Github for this? I kind of like the npm model where they say "don't cache it, we guarantee as much capacity as you want to re-download packages". I use a lot of go modules, and each of our container builds ends up fetching them all. Github rate limits this and you have to either vendor the modules or provide a caching go module proxy (Athens, etc.). Meanwhile, npm just uses Cloudflare which seems happy to serve as many requests as I desire.

In general, I find that caching/vendoring dependencies is the most sane thing to do, but it's not what, say, the Javascript world appears to be doing. Do we want to move towards a service that already rate-limits package fetches when we already have a service that doesn't?