Even though it's actually usable for very little, Rhapsody remains my favorite “weird dead-end Apple thing” just for the novelty of having essentially NEXTSTEP 5.x (Display Postscript and all) with a Mac Platinum UI. Copland would probably hold that title for me if any of its builds actually worked, but Rhapsody has real stability, real application support, and a real POSIX environment via its NeXT heritage: http://rhapsodyos.org/ https://betawiki.net/wiki/Category:Mac_OS_X_Server_1.x_build...
Mac OS X Server v1.2v3 a.k.a. Rhapsody 5.6 is my favorite thing to run on my Blue & White G3 — the OG New World machine `PowerMac1,1`! https://cooltrainer.org/rhapsody-in-blue-and-white/