ET dev here.

ET is primarily made for IP changes and also because the kernel/router will sometimes kill stale connections, and it's not possible to send keep-alives if your laptop is asleep.

There is no lag compensation because ET is not a terminal emulator, it's only a remote shell. I cannot create predictive letters and undo them reliably (passing backspace commands to the terminal sometimes does not undo the last letter). Lag compensation would need to be implemented by a terminal emulator such as hyper.js.