The fact older platforms were based on a fixed hardware design helped prolong their life and software support greatly. These days that is really only the case for games consoles. For the PC market that has never been the case due to its completely modular nature, and the PC market being the centre of continued hardware development, so the components are continually in a state of progression.

Continued software development and use of older platforms for a long time after they should have ended just shows how much people become attached to something. The Amiga especially still has something very special that keeps many people continuing to use it even today. It is hard to explain what that special something is to someone who isn't a part of that continuing community, or has any memories of using the systems back in the day.

Maybe we are all just overly sentimental? Or just the determination to prove a special platform still has some life left in it and still serves a use. The legacy of their designers.

It is also made what some people have managed to achieve on old systems. Look at the Commodore 64 web server for example. Or some of the ported famous Amiga demos to the C64 and Vic20, just to prove they could be done.

BTW, good luck getting your A600 up and running. Do you still have the A630 and are going to try getting that to work also?