I think because it has that 68K charm, unlike todays Winintellymac corey duo machines. Like you said 80s and 90s.
I grew up in the early 90s, didn't have an Amiga, but seen it in commercials. I had a Sega Genesis. Some Amiga games made their way into the Genesis.
I think of the Amiga as a Hobby, a retrocomputing experience
to get away from my stressful job. It's like fixing a vintage car on a Saturday morning.
Did you know that AmigaDOS was based on TRIPOS language?
Similar to UNIX.
Try googling it. I found it to be interesting