Other than for the fun of it and the possible identification of obscure bugs, is running NetBSD on an Amiga actually useful? I love that they still support it, but once you've installed it, what would you do with NetBSD on an Amiga.
Not that anybody needs to in this day and age with heaps of old laptops and raspberry pis and whatnot, but I knew someone with an Amiga running BSD for their mail server. A simple web server with static pages, or anything which is low volume would work just fine.
Probably the same things you do with NetBSD on a Macintosh IIci. In my case, it handles internal print services, AppleShare, DHCP and DNS.