Make no mistake - most of these devices won’t be used as pdf readers - they will end up in the landfill. This is part of the business model, and we + the environment pay for it.
I have 7 Macs that I use to operate 3 businesses (and 2 more by way of consulting); precisely none of them use the App Store.
1. The security issue i mentioned earlier applies to macs. It’s a bit easier to mitigate because an older mac can run a newer non-system-linked browser. But e.g. firefox is dropping support for 10.14 (released in 2018) this year (https://support.mozilla.org/en-US/kb/firefox-users-macos-101...)
2. If you keep your os up to date as long as possible, new features will drag performance down to the point of being nearly unusable. So you’re forced to tradeoff between security+features and performance.
Of course, with a old mac you can always install linux to extend its lifespan… but that’s not thanks to apple
The iPad 3rd generation was released in 2012, so the 2016 9.3.5 iOS release gave 4 years of security/bugfix support for the WiFi-only version of that device.
Which means there is a decent chance an iPad running 9.3.2 is vulnerable.
And there have been thousands of CVEs since 9.3.2. Most of low severity, but not all.
This is in a lot of the reporting about the topic and linked repeatedly in these comments. Please don't repeat false information.
Now you're right that this particular really old version also doesn't get security updates - but boy do I not have that expectation, and I would be surprised if anyone acting in good faith did.
With all respect to PCs, my HP Pavilion DV6000 from 2006 works acceptably with Windows 10 once it got SSD.
This should be possible with computers too.
Your average PC build will be completely outdated after ~5 years, suffer some type of hardware failure, or have nearly all of it's software (BIOS, OS, drivers) dead and unsupported by then. It is then only usable by enthusiasts / developers, and ends up in a landfill otherwise.
This might have been true 20 years ago, it really no longer is. My main personal computer has a CPU that was released in 2014. I got it for free from a company that was getting rid of it, I guess they could justify getting better machines. I replaced the HDD with an SSD, but that's it. I don't know when the computer itself booted the first time since I'm not the first owner, but chances are that it's about 10 years old at this point.
I mostly use Debian, but Windows supports this computer just fine as well.
The main reason electronics become unusable these days is software bloat (e.g. going from Windows 10 to Windows 11), not the hardware, and a Windows PC still feels like it can last way longer than an iPad can.
Cars still work after 15 years and have plenty of electronics in them.
Phillips HUE bulbs from 2012 are still going.
Not to mention apps (usually banking apps) that plainly refuse to work if you aren’t running the last version.
Literally everything else, that is not Apple hardware.