Less than 1% of the population is interested in changing tires/wheels twice a year. I have, but most won't.
Judging by the number of people running studded tires in an area where it snows every third year, I think your estimate is a bit low. Of course, I believe many of them do it because noise from the studded tires remind them of the baseball cards they stuck in their bike's spokes so many years ago. Four more days.
This reminds me of one of the reasons I want my Model 3: The Roadster is too small to carry tires. Twice a year I have to load my tires into the Prius and drive them to the tire shop. Then I drive home and get into the Roadster and drive it to the tire shop to have the tires switched. Then I drive home and get back into the Prius and drive back to the tire shop to load up and haul home the off-season tires. The Model 3 will be able to carry its spare tires to the tire shop to be switched out.
I need to do this soon. I was hoping this would be the last time I'd have to do it. But now it looks as though I'll have to do it twice more after this. Grump!
At least it's an excuse to pig out on popcorn, which the tire shop gives away free for the several hours I have to wait there, since they don't take reservations. It's a crapshoot how many people will be ahead of me, and therefore how long I'll have to wait. When I lived in Fargo the tire shop would store my off-season tires. But the tire shop here does not do that.