Seeing all those old icons makes me realize how much I miss them. Superficial, perhaps, but they were one of the things I loved about OS X when I made the switch back in 2005 or 2006.
Right now my dock is a soup of squircles. I have to scan multiple times to find icons even though I know roughly where they should be.
They aren’t distinct. They don’t stand out.
That was never a problem until last year. 40 years of Mac was fine. Then that.