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this post was submitted on 21 Aug 2023
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No Stupid Questions
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Good explanation and lines in with why iPhone get years of support as they have full control of hardware and drivers.
I mean an iPad mini 2 would obviously struggle with iOS today due to hardware limitations.
And you’re very much free to use it, problem is app developers do not find it worthwhile their time supporting older devices (we are talking devices that’s a minimum of five years old, more likely 7-8) so few use them and it impacts what they can and cannot do. Thus it becomes unusable.
But all Apple apps will obviously still work.
My 10 year old Thinkpad barely qualifies as “running” windows 10, not Ubuntu for that matter. Haven’t bothered trying 11. I do partly agree with you, especially moving forward. But an iPad mini 2 has 1 gb of ram and 16 gb of space, both rather huge limitations for a mobile OS of today.
Did a computer bought to run windows 95 run XP? Did a computer bought for 98 run Vista? That’s a more fair comparison, as mobile operating systems are very young. And mobile devices from 10 years ago have hardware that could not really be compared to computers.
Sure, processors at peak capacity where good. But forcing a 10 year old processor running todays software would drain the battery - that was also in no way comparable to today - to fast. And that is even if you could install the OS, as there is so little device space on many of them. Then you open one app and you’re out of ram potentially causing crashes all over the place, because mobile apps are rarely built for efficiency.
It would be a horrid experience.
XP was based on the NT kernel while 95 was using DOS. You’re just plain wrong. Spec wise it would not have worked.
And a computer built for 98 sure as hell did not reach the requirements to run Vista. Hell, many XP computers struggled and were not allowed to upgrade.
You’re just plain wrong.
I’ll do that while you stick your head in the sand to facts
Kind poster, I understood about 4% of what you wrote and absorbed 2% (entirely not your fault). Would you say that this explains why Google only supports their Chromebooks for 5 years?
ETA: My question is based on what you wrote here:
This only concerns the kernel which is rather unimportant when it comes to Android updates. You can keep using an ancient kernel for an insanely long time but upgrade the Android userspace. The vast majority of LineageOS devices use the original kernel they released with (+bug fixes, usually).
Only when Android has a hard requirement on a new kernel feature do you need to actually upgrade it. This is usually end of the line for a device in custom ROMs because it is infeasible to do in most cases.
Take the Oneplus One (bacon) for example. It was released oven 9 years ago with kernel 3.4 and only lost LineageOS support with Android 12 because that requires eBPF for firewalling apps which is a relatively recent addition to the kernel.
The shims for the HAL you mentioned are in userspace. The original BLOBs they shim use the original OEM kernel interfaces in order to do their magic. It's just that Android might require newer/different interfaces from the HAL BLOBs; that's what the shims are for.