I'm probably biased, but, I think the Amiga is toward the sane end of the scale. The OS is extremely flexible and adaptable, we have the Aminet resource, and there are still (relatively) many expansions and peripherals available. I can still happily use mine for nearly everything.
Some comparisons:
G3 with MacOS9: abandoned, browser choices much worse than Amiga. Not bad.
Mac 68k w/OS7.5.5: there are resources and I still enjoy these. Somewhat fast and usable.
Apple II: there are people and resources, but the OS is p-r-i-m-i-t-i-v-e.
X86 - pre-windows: I'm not aware of any devotion, I keep a couple for nostalgia. Oddly,still fun.
Hp 80 series: cool on many levels, almost no current uses.
PCjr: some one may want it some day, grin.
Osborne 1: cool but little software.
Atari - 8bit: see Apple II, but fewer resources.
C128: like Atari & A2, but I have no excitement for it.
Timex/Sinclair ZX81: lol!