Yes, you deserve to use garbage. But you’re twisting my words. I said you deserve to use garbage if you willingly update the device through seven major versions and expect quality. Apple gets away with this every single time because people keep updating anything and everything.We "deserve to use garbage" if we spend a grand on a device and expect it to be updated with the latest apps for as many years as possible? That's certainly an opinion.
So should we upgrade or shouldn't we? Make up your mind. Obviously if updating the latest apps wouldn't require a new OS then we wouldn't have to update iPadOS. If I followed your advice and only installed 2 new OS versions on my 2021 M1 iPad Pro I'd be stuck on an old version of Logic Pro right now for iPadOS 16 and couldn't use all the features I pay for.
You Update (an iOS version) and you Upgrade (a device). You should upgrade a device when Apple pushes too far. That has historically been device-specific, but I can guarantee that the oldest-supported device is already too far. And that will probably be earlier than that, depending on your tolerance.
If they obliterate the device’s performance and battery life, then they are wrong. They should allow you to at least stay on the major version you’re currently on. Who cares about security updates if for them I’d have to update my Xʀ on iOS 12 to iOS 18? That’s just asking to have garbage.They promise to keep you updated and that's just what they do. Google with their Pixels and Pixel tablets with 7 years of promised updates does just the same thing as Apple. If you want security fixes you gotta upgrade the OS to the latest major version. Only difference is their Tensor SoC's are all slow out of the box so your performance will be much worse much sooner than with Apple. At least Apple gives you devices with incredible performance that beats the competition even years down the road. (Like why is my iPhone SE 2022 as snappy as the Pixel 9 Pro, that's just absurd.)
I expect devices to work like-new, forever, for the tasks that the device is capable of when it is new. If the on-device keyboard has no input lag when the device is new, then it expect it not to have input lag forever. If the device runs version 0.9.0 of say, Minecraft, or any game you like, flawlessly, then I expect my device to run the same 0.9.0 version of Minecraft flawlessly forever. If there’s no scrolling lag in photos when it is new, then I expect that to be the case forever. I have zero tolerance for garbage. That’s why my iPhone Xʀ runs iOS 12, why my 5th-generation iPod Touch runs iOS 6.0, and why my current iPhone 16 Plus is running iOS 18.3.1. With some luck, it will run iOS 18.3.1 forever. I want perfection, and with devices running original versions, Apple has consistently delivered. I have no tolerance for garbage on a premium device.If something like a 4 years old M1 iPad Pro is too slow for you on 18.5 in 2025 then it's not Apple's fault you expect a 4 years old device to perform like a brand new one. I have that iPad and the M4 version and of course the M1 is nowhere near as snappy in day-to-day use. But one's brand new and the other's 4 years old. The M1 certainly isn't unusable. I wouldn't even notice it as much if I didn't have both side by side.
Your expectations are different and I respect them. You will update and if you go over the limit, you will say “okay, the processor is too old, I can’t expect it to be good”. And as long as your expectations are those, I respect them.(I admit that after 6 years I might leave the M1 on version 26 or 27 but at that point I am not surprised that an aging M1 chip from 2020 is too slow for the latest 2026/27 OS. Definitely skip the last version or the last 2.) I expect this to be less of an issue with M1 models and even less so with M4 models going forward as the jump in performance with M1 and then with M4 was huge.
But I would NOT respect you saying something like “I updated my M1 iPad Air to iPadOS 31 and battery life is about two hours of SOT. Performance falters everywhere, does this happen to anyone?”. You should know that that many major versions are bound to worsen quality massively.