I only load for the .223 now although I still have all the gear for my old 7.62x39 even though I no longer have a rifle for it.
But I've always had a fascination with smaller rounds and ultimately I'd love to have the rifles/shotgun and be able to load for .22Hornet and a .410, maybe something like a .17Hornady Hornet.
And of course I need something like a .30-06 but for now the .223 just works for everything on the farm from rabbits to hogs to deer