troff is kind of long in the tooth these days as its niche has been mostly taken over by TeX/LaTeX. The only place I ever see nroff/troff used nowadays is Unix

troff is kind of long in the tooth these days as its niche has been mostly taken over by TeX/LaTeX. The only place I ever see nroff/troff used nowadays is Unix manpages. Old Bell Labs guys probably still use troff. Just keep in mind that you don't have to use Knuth's fonts to use TeX, just as you don't have to use Times Roman to use troff.