Configurable timeout for prefix keys?

[Sz.]

In "normal interactive user mode" it makes no sense to wait indefinitely for an input event to complete. It would be much better to auto-cancel it, sparing the slightly inconvenient & arcane C-g, or a frustrating "dunno how many exactly in this particular counter-intuitive context, but certainly more than one ESCs" punchfest.

But over a network connection, when it's a macro of some sort that hangs, it could be disastrous to cancel the flow, garbling the subsequent input sequence entirely (in case it resumes)!

But as a "minor mode", turned on explicitly by an interactive command, it should be fine.