Max nostalgia. When I was ~12 years old I had an 386 PC we got for $5 from the thrift store across from the dump (a bargain for sure even at that time). I had to self-teach myself about DOS, BASIC, Win 3.1, etc. I somehow broke the Win 3.1 installation and all I could find was Win 3.0 on floppy disc. I got the thing reinstalled, but found that the sound drivers didn't work, random programs wouldn't open, and it kept crashing.
I learned years later that there are a huge number of changes between 3.1 and 3.0. The biggest being support for more memory and multimedia extensions. The latter was the first time I learned what a dynamic link library (DLL) was and that took me down the rabbit hole of C++.