They do, and if you ski the alpine backcountry without one then you must have a death wish.
Avalanche safety is one use case where, as with defibrillators or hospital pagers, I think people will continue for a long time to use simple, rugged, and purpose-built devices with very low probability of failure rather than introducing a million new failure modes by using e.g. a cell phone or flying drone.
Avalanche safety is one use case where, as with defibrillators or hospital pagers, I think people will continue for a long time to use simple, rugged, and purpose-built devices with very low probability of failure rather than introducing a million new failure modes by using e.g. a cell phone or flying drone.