[SFS] Is it a good idea for a Internet-facing router to do more than routing?

[Dennis J Perkins]

I've been looking at Freedombox, which is a project for a private home 
server for non-experts.  One thing it can do is act as a home router if 
you want.  The Amahi project can do the same thing. However, I remember 
reading back in the 90's that you should never put other things on an 
outward-facing  router.

I'm not so sure if this advice is still true.  Everything goes thru the 
firewall, so if something gets thru it, your network at risk anyway.

OpenWRT lets you put services on the router too:  a print service, 
Letsencrypt, OpenVPN and Wireguard, and maybe more.

What do you think?