To be fair to Apple, the 1st gen SE came out in 2016 with a 2015 chip and a 2012/2013 body, supporting it for this long is very impressive. There's still the later generations SE (I'm very happy with my SE2) or the 13 mini.
But also 2016 is only 6 years ago. It's not just Apple thing, but it really doesn't feel sustainable for us to keep write off our hardware every half a decade.
I feel like expecting 6 years of updates out of the iPhone 4 would have been kind of ridiculous!
I'm happy for your old computer running a distro of linux that still supports 32 bit processors, though.
I’m still using my SE, and will continue until it dies