I love that so many people have fond memories, and I assume it says something about the state of bootable linux distros that Knoppix is not as unique anymore.

Knoppix was my first experience with Linux over 20 years ago; my brother-in-law introduced me to it and it was really neat. "My computer isn't just Windows!"

Now with major distros offering live sessions in their installer, you can just hop into Ubuntu/Fedora/Arch.