I typeset some university work in troff in 1994. The professor I submitted it to was impressed but questioned my sanity in front of half of the class. Not wrong to do so.

Might still have the source code to that work somewhere. And it probably still parses.

Can't remember why I did it but on reflection it might simply have been that LaTeX was not going to fit on my extremely space-constrained Linux machine but troff was already there.

ETA: this sentence made me chuckle. "It's much easier to read without the inline comments:" Oh yes, much ;-)