Also, unlike a lot of other manufacturers who only provide builds of Linux for their own hardware for a couple of years, it seems that even the latest version of the official Raspberry Pi OS supports every Raspberry Pi model all the way back to the first one with the 32-bit version of the OS.

Likewise, the 64-bit version of the OS looks like it supports every Raspberry Pi model that has a 64-bit CPU.

https://www.raspberrypi.com/software/operating-systems/

I can confirm that even my first rpi from over a decade still runs fine with newest dietpi.

Yeah I was very impressed at being able to download a raspi image last year for my original pi model B, most companies would have just told me to throw it in the bin and buy the new one (at 10x the price lol)