The Utards here seem to think Alta/Bird is going to slide on you.
And phantom slides in Tahoe.
I don't know how much you've skied here, but there are days during stormcycles where the snow is nuking (2,3,4+"/hour), the wind is blowing a Gail and a beacon is a good idea. I won't go as far as to say "requirement" as others have, but just a good idea. I mean, what's it going to hurt? All of the patrols I have ever come into contact with do a great job of keeping up on Avie control, but it can snow so hard here, there ARE times where it gets ahead of them. I remember 5-6 years ago when main chute slid while the area below (ballroom) was still open. It was just under the conditions that I described above. The patrol was on their way to close ballroom when main chute went. I remember sitting at the lunch table and listening to the radio traffic calling for the dogs and organizing for a probe line and beacon sweeps. They made a quick sweep but never instituted a probe line as the they assessed the danger for a second slide as too high (I think with the west wind that deposition rates on blady were 6-7"/hour). Most of the resort never knew the slide came down. Fortunately nobody was caught, but they weren't 100% sure until all of the parking lots cleared for the night.
So had you been wearing a beacon in that situation you would have been way better off than not. I'll also agree that getting caught inbounds is a situation that is well over 1,000,000 to one, but people hit those odd in the lottery everyday.