There's a lot of nostalgia in the comments here. I wonder if any reader under say 25 is willing to comment; do you think OS's today are a regression? do those look better?
To me they look unwieldy, heavy and overwhelming and I can't help but think the love for them is just the love for youth or whatever
There is definitely an element of nostalgia. However, a lot of earlier desktop OS GUIs do seem to be more internally consistent and with more emphasis on usability than the current crop. I think part of the issue is that things that might make sense on a phone have bled into desktop OSes, where they make a lot less sense.