I'm sorry, but I just don't share your experience. Also, I'm comparing Apple products to Apple products, not Apple products to Android products. Android products are notoriously bad with updates and aging, especially from several years ago and earlier. I've owned both Apple and Android devices since both first came out. I agree Apple devices age better, but Apple devices do get slower with each new update. This is not an isolated incident. Many, many people have experienced this. I think this will become less of an issue as time goes on with how fast phones and computers are getting. Again, Apple is most definitely known for planned obsolescence. Apple is very much in the here and now ... and although it's great they have far better support for older hardware than Android by a wide margin (it's not even worth comparing, Android is a joke in the update department), that doesn't change the speed of their devices with each new OS release. But like I said, this will become less and less of an issue as hardware gets faster and faster, especially the phones. The problem is much less of an issue on Macs, except they do cut off entire hardware lines after 5+ years. It's definitely not like Windows where computers will get support for a decade or so. Apple does like to move forward and they don't want older hardware gimping what they're working on right now. Although that's perfectly understandable, it's something that should absolutely be considered when buying older Mac hardware. And when Apple moves their OS to AFS (Apple File System), they may very well cut off even more Macs at that point and only support Macs that come with solid state storage, since that's what AFS is specifically made for.
And of course there are those that simply don't care that the Mac they're buying can't be updated anymore if it does exactly what they need it to do. Same with phones or tablets.