I'm interested to know what the future of remove development with emacs might look like. I'm a long time emacs user, and use rust, lsp-mode, magit and projectile heavily. The remote experience with tramp just isn't very good. I've had to work around several bugs that lead to hangs, and even though I'm only ~20millis away from my remote machine performance is pretty bad. I believe I've already done everything I can to make it fast (ssh control master, etc.), and I'm still not happy. On the other hand, VSCode (which I'm not familiar with) or IntelliJ make remote development a breeze. I really like how they hide latency, and handle reconnects well. I've also tried terminal emacs on the remote machine, but I just can't deal with the input lag.
It's remarkable how emacs has been able to adapt over the years, and so I'm interested to hear about some ideas to keep emacs relevant for this usecase.
That's why I said that model needs to be extended. There's no reason emacs server couldn't send stuff over a TCPsocket to emacs client. Emacsclient and emacs server are separate OS processes, so they already communicate via external mechanisms.