On 12 April 2017 at 22:25, Toby Thain <toby(a)telegraphics.com.au> wrote
(in part):
[...]
I did a 400+ page novel in it once.
Tanenbaum wrote all his tomes in troff, praising it in his prefaces,
and it comes
with MacOS (bit of an amusement, that).
N.