USB is intended that users can add and remove devices
at any time.
Is it possible to make JACK being prepared for
removing devices while it runs on them? This not only
belongs to USB but firewire devices as well.
It may sound ridiculous, but especially if jack is
running but no audio is put out I managed to remove
the soundcard accidentally more than one time -
usually making a reboot necessary :) .
Not a major thing, but "nice to have".