I really don’t understand Tesla’s FW update rollouts.
That's OK, nobody does.
I’d much prefer the Apple system to check for new firmware and install it when you choose.
Tesla uses the fleet as beta testers... so they'll send out a FW update for a small group of people to beta/stress test it, and then if it seems to work, then they'll start rolling it out across the fleet.
Apple, OTOH probably has thousands of internal beta testers to test every aspect of a FW release before it goes GA.
If you look at the stats on EV-FW.com, you'll see a release every couple of months that goes out to several hundreds of cars. Other interim releases are usually under 100 or 200 cars.
I don't think Tesla wants to do it the Apple way, because they just don't have the infrastructure to support everyone downloading a FW update at the same time, especially over 3G/LTE where they're footing the bill.
disclaimer: I'm still on .42 and can't do a damn thing about it. I was even at the Milford Service center yesterday (not for service) and that didn't even trigger an update (yes, I know that's not a thing anymore).