I think 9front (Plan 9 fork) dev, cartoonist and fiction writer Stanley Lieber also formats a good part of his stuff with troff, e.g: https://massivefictions.com/2024/06/24/0/

"This book was typeset (troff -ms|lp -dstdout|ps2pdf) in URW Garamond No. 8 by the author, using an MNT Reform laptop running the 9front operating system."