It's been super amazing to see how much they could continue to support newer hardware and keep it going considering that I don't believe they have the kernel source.

It wasn't too long ago I saw OS/2 on some ATM machine that was crashed.

I used to love OS/2 back when developing DOS applications (since I could crash the app and not the machine). OS/2 got me interested in "real OS's" and then SunOS in college, etc.