NetBSD is great because:
can support lots of hardware;
minimal but featureful;
secure;
pkgsrc;
friendly community;
It's like a good middle ground between Free and OpenBSD. Anyone into "minimal" linux distros might get a kick out of it.
Anyone interested should check out https://www.unitedbsd.com/ It's a bsd forum with a good number of netbsd users and a couple of developers as well.