_If_ we added yet another groff extension to man(7), analogous to
mdoc(7)'s `Sx`, we could support hyperlinks directly to man page
sections and subsections. (On terminals, we'd still need a way to mark
locations in the page text as link targets, and for it to be practically
useful, pagers would have to grow more features. Given the amount of
idiocy, particularly from people who think that a URL in a terminal
window is a security risk in some way that a URL on a web page isn't,
that Egmont Koblinger has had to put up with in promulgating OSC 8, I
would not count on the infrastructure for this materializing soon.) But
for PDF all the pieces are in place; they just need some glue in the
groff man(7) package.