Plunge style routers are nice for projects where you need to make a cut, lift the router to reposition, and then return to the same depth of cut without counting turns or anything of that nature. Equally spaced flutes, box border inlays, tenons at opposite ends of the projects, etc. A fixed base router with a nice depth adjustment is about as simple as it gets, so if you’re just looking to plane out and process slabs or table glue-ups it’s hard to beat.