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.
I do agree with you that Apple have done well to support this.
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.
Distinguishing feature of the original SE is its form factor. Successors are large phones branded as SE, unfortunately. So, they won't make up for the original one.
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.