I suppose wildcard DNS would not work for you?

I have a *.svr.domain.tld on Google Domains (need to transfer somewhere else), and then on Caddyfile I can register individual foo.svr.domain.tld without touching DNS

I have vscode but on my os and then connect via the remote extension. Works well.

For docker, I’d rather go with VM if you want isolation from one project to another. They are easier to snapshot and easier to reason around for development in my opinion

If you don’t feel slowed down, I wouldn’t change a thing honestly. At most consider cabling your media devices instead of streaming over Wi-Fi.

2.5g works on cat5e for reasonable distance. I’d be surprised if anybody today would have something slower.