If you use an old enough editor, they've designed around limited bandwidth for screen updates, and they tend to work ok with high latency. Usually, when I'm doing editing, I don't necessarily need to see the screen update until I'm done typing a line (although getting the cursor in the right place can be painful beyond maybe 100ms roundtrip, especially if it's inconsistent)

A split editor, with a local ui and filesystem remote can be made to work, but you do have to install something on the remote end, which brings you back to the remote end doesn't have the environment you want, so you just suffer with whatever is there problem.