I don’t know. My m1 iPad Pro is on iPadOS 26 with no issues. (Spouse uses it so she has to be happy)
Threatened to leave the Appleverse doesn’t creat any urgency for Apple, leaving does.
Leaving Apple does nothing. You can’t touch Apple’s decision-making process as an individual.
There is no individual solution. Apple might (MIGHT) only listen if adoption rates plummeted so much that the whole equation changes.
Since Apple does not allow downgrading, and those who refrain from updating are a massive minority, and those who downgrade during the first week are an even smaller minority, there is no solution even if Apple screws up badly.
The last major iOS update with this level of pushback was iOS 11. It significantly affected battery life and performance on every device, including the then-latest updatable iPhone, the iPhone 7.
Adoption rates were slightly slower, but the complaints were so many that Apple touted performance on iOS 12, whilst killing battery life regardless.
iOS 11 was installed on 65% of devices by January, which is still not low enough. (76% for iOS 10 by January).
It seems that the complaints got to them because it was the only time that performance was touted so heavily for older devices.
By iOS 13, the outrage had passed and Apple went back to obliterating devices. People went back to updating (55% in a month for the last four iPhones).
The only solution is an impossible utopia: We should make the adoption rates so low that Apple has no choice but to listen.
Automatic updates, the security ghost that apparently haunts everyone, and compatibility issues make this pretty much impossible.
iOS 26 is controversial. Design, battery life consumption by the new animations, performance issues on every device including M4 iPad Pros, etc.
But if we see that it has 85% adoption rate by January, then as a collective we have decided that this isn’t an issue. Which I am okay with, but it takes away every single legitimate complaint: You can’t complain if you are knowingly part of the problem.
Why would Apple do anything if you people keep updating? Why would Apple be worried about any issues with updates if they know you will update anything and everything to any iOS update they release? It makes no sense.
The solution is individual: you aren’t happy? Stop updating. Otherwise, frankly, you have no right to complain. This is on you, the user who is willing to install every iOS update. I’m okay with that. I’ve found my solution even if it is unpopular. But I have no sympathy for chronic updaters: you are willingly walking into this.