To be fair, x86 Debian will happily run on a Pentium II from 1998.
What's amazing about the PII is it's the oldest "modern" computer in a few ways. USB came out around the same time, and i686 is the oldest x86 architecture still supported by modern distros out-of-the-box. i686 will be 25 years old in November. The fact that it's still supported is incredible.