I don't look at groff_tmac very often. I just noticed this entry for the mom macro package:
mom The new mom macro package, only available in groff. As this is not based on other packages, it can be freely designed. So it is expected to become quite a nice, modern macro package. See groff_mom(7). Mom's been around for almost two decades. She's no longer the new kid on the block. Isn't it time this entry be updated? -- Peter Schaffter https://www.schaffter.ca