Comment by simoncion

> The main problem is they use up an increasingly scarce USB port.

This logic I do not understand. USB hubs exist and are more-or-less commodity parts these days. [0]

I'd be surprised if the fingerprint reader was anything faster than USB 2.0, and deeply offended if the reader did anything other than idle on the bus when it's not being used... so you're not going to be suffering any real bandwidth contention by putting that guy and a USB 3.x device on the same hub.

[0] They're also usually how motherboards that have a whole bunch of USB ports hook those ports into the onboard USB controller(s). (Do folks usually think that every one of the 10gbit/s ports on one's desktop machine could be simultaneously run at 10gbit/s?)