Thanks folks! All good comments.

Mt. Rainier, Mt. Hood, St. Helens, these places are always full of tourists and rangers. When I "solo" hike and climb on them in the summer there's always been someone else in sight. Got on those skis a few days ago and it was a different story. But with all those rangers and emergency response gear around I'm thinking a PLB signal might get to them in minutes after activated and they can be to a lost soul in a couple of hours, especially as I always notify them of my routes. Maybe even in time to dig someone out of an avalanche (providing I can activate the PLB while still conscious).... As someone mentioned, it's also polite to wear a beacon to enable a speedy body recovery.