Now, not so unusual, I have pretty dull and standard "gaming" type PC running stock Debian, but about 20 years ago as a broke mofo I was running a phpBB forum off a wheezing Pentium MMX laptop with no screen (got ripped off a year prior) on Mandrake Linux. The whole thing was just loosely sitting under my bed. Managed to get a userbase of just under a hundred people before I lost interest. I was using Webmin to manage it from another PC.
I had to connect up an external monitor every time I needed to do something I couldn't do remotely. I learned so much from that laptop. "./configure, make, make install" became muscle memory.