Yes. For remote control, drawterm (a client to "cpu" into a plan9 box from a non-plan9 box) can even make the GUI feel local over poor connections (except if you try to play doom or something).
That's over a LAN. But what about over the distances earlier in the thread - the earlier example was a line across a significant bit of continental US. [More interesting still would be Sydney to London.]
No, I was talking about WAN, not LAN. (Note that 9front's fork of drawterm is a lot faster than the normal version - a regular drawterm can be a bit slow)
I am not located in the US, but hopping borders in europe does not seem to be a problem. It's less of a problem than with X-forwarding or VNC.
As for regular fs mounts (note that a remote control session on plan9 is actually also just a regular fs mount), I mount things from the US every once in a while, and I am located in Sweden. It's obviously not fast due to very high latency and limited bandwidth, but it works just fine within those constraints.
But of course, if the RTT >1 second, then it will take >1 second for a keystroke to show up on screen in a remote control session. You cannot be resistant to this (mosh tries to guess how things would look if the keystrokes had gone through, which is a major hack, and not really an issue).
