Apple is rather good at planned obsolescence. Intel handed them a few years of unusable machines on a platter (thanks Intel) but I’m sure they’ll find new reasons for MacOS updates to degrade performance on old machines regardless of hardware capability.
They lead the industry in how long they provide OS update support for phones/tablets and desktops/laptops.
They downclock the CPU on mobile devices as the battery ages, to keep the CPU from browning out so you
My system, made in 2013, won't be supported by the next OS release this coming fall, but they usually continue security updates at least one release behind. That's basically ten years of hardware support.
Keep in mind that Windows 10 came out in 2015. A ton of manufacturers simply did not support windows 10 on hardware sold before it, because win10 coming out helps them move new PCs.
Linux and Windows both support most hardware for longer than Apple does. It may not have a manufacturer stamp of approval, but Windows 10 supports CPUs back to some Pentium 4s with full security updates. That's a decade farther back than Apple.
