I know the older macs demanded less in the way of processing, but by a rule the older they are the more reliable. I still can boot up my PowerMac G3 desktop. (Love the thing, it has a few OS9 programs that still rock out pretty hard, including SoundDesigner and its awesome pitch bend envelope)
I’ve probably had about fifteen different mac systems. Raised with an Apple II and had a LC through school. Man I have loved every one of them.
I think the software system design has become pretty flawed, though. Macs were made to be open system.
Conversely, the older my newer Macs get, the less they functionally work. The shift to blacklist any 32-bit program in the name of progress is inane. There should just be a simple switch (A physical one! Maniacal laugh!) on the side of the machine that swaps back and forth from 32-bit, if needed. I have two iPads now for all the great 32-bit apps that will never get updated (and another iPad running later software to allow for the newer things) and soon will need two Macs as well, as they plan the same 32-bit ban on those with the next operating system upgrade. On the short list of things I expect will get murdered by that: Korg’s Microsampler application, a few other small midi tools, etc. There are countless useful 32-bit (and before) tools for making music that get killed by Apple’s egotistical move forward to make new operating systems.
And in the corner of the room, still happily running OS9 is my 20 year old G3. It has AFTER DARK on it, playing a wonderful bunch of screen savers. I still love the black and white elevator one.