InputOptions

A disabled source is inert, not absent: its state stops updating, it never takes the prompts, and — for the gamepad — the poll stops outright, so an application that does not want controllers pays for no snapshot at all.

True is what makes support seamless: a consumer that wired nothing still gets a working controller. Pass false and call poll() where you want the sample taken — which is what a recorded replay needs, since a sample pinned to the fixed tick is reproducible and one taken on a frame callback is not.