I once entered in a class and heard the familiar Windows 95 startup sound. Thinking it was a VM, I went and checked: a group of students were customizing their Linux distribution to look like Win95.
I asked them if they knew fvwm95, the window manager of my youth; they didn't, and I suddenly realized that a) it's not supported anymore b) they were all born after Windows 95 was released c) I'm slowly getting old.