We might indeed try use such a CDN if it turns out to be needed (probably not cloudflare, to not centralise the web too much). Ideally people would all just get our site via peer-to-peer delivery instead.
Totally agreed. We self-host pretty much everything (other than the servers itself). Though I suggested Cloudflare, I was really nudging you towards maybe using a CDN since CDN has it's use cases. People have suggested BunnyCDN as well. That said, we don't use CDN ourselves, even for https://cloudron.io and https://docs.cloudron.io. It's served from surfer. This is mostly for ideological reasons, we are willing to give up on some speed and not centralize (we used to have it on AWS Cloudfront before).