just_another_person

No, just means they need to set the correct move.

Well, routers CAN be switches. OP is just not using them in the right way.

That's not how DHCP relays work.

Having an HTTPS enabled server behind a proxy means the server is connecting with the proxy endpoint. That's not how HTTPS works. If you want HTTPS enabled for a server BEHIND a proxy, you would do it at the original hand off (forward proxy), in this case meaning the Cloudflare proxy that clients connect to.

You're seeing the errors because the proxy backend is being told to speak HTTPS with Caddy, and it doesn't work like that.

R2 has no ingress or egress fees

Wut

See your own answer for why that isn't needed.

I personally don't find that many people are approaching me saying something like "Hey, you should be into this thing because it's to your benefit". That's what insane US Christians do.

If someone mentioned a concern they were having with publicly available services, and I happened to have a self-hosted version of an alternative ready to discuss, sure.

By no means would I ever be out there trying to tell people "THIS IS BETTER. DONT YOU GET IT???", which is where you sound like you're coming from. It's also not a "hobby" and it takes a lot of skill and effort to not take an INSANE amount of time for people who aren't familiar. If you want to be tech support for a bunch of people, sure, go for it.

Totally unnecessary though.

Why would this person want KVM? They don't need anything a full VM provides, they're just trying to run many services easily on a single host.

You're overthinking this. You don't need an actual VM for services. Containers are fine. If you're worried about security, go down the Katanor gvisor rabbithole, but you definitely don't need an entire OS and VM running for simple services.

There's no reason containers can't be hardware accelerated. I'm confused by what that statement means.

Uhhhh, why?