That wouldn't be terrible to use. I feel like I've done worse supporting in-cab computers on fleet vehicles across 3G cellular.

Keyboard shortcuts and "caching" the state of the remote client in your mind are the keys to doing that work.

Low bandwidth is a bigger problem than high latency. If it takes half a second or even a second for your clicks to register it's not a big deal, you learn to work around it. But if the bandwidth is so low that it takes 5-10 seconds just to write the screen it really sucks.

Yup. 57kbps transatlantic modem connection to a remote desktop in some country with poor telephone connectivity was probably even worse. Never want to have to do that again!