I've had only one set of my numerous skis (too many to count) stone ground in the last 15 years and that's at 60+ days per yr on skis. I only do simple universal wax jobs, sharpen and ptex gouges now. Nothing complicated like base grinding anymore.
While living out west, after seeing how me and all my buds who were semi pro, ex ski patrol, ex instructors & guides got absolutely TOASTED via finesse and speed... any time my ex brother in law visited from the Ascutney VT area, came skiing w/ us on his 25 yo hand-me-down skis that were never tuned, delaminating and the metal edges peeling off, I learned that it really doesn't matter unless you're clocking for a team.
We learned that we had to hike him into submission to slow him down. Since then I wax, sharpen and an occasional tune up. When I got my Bones bases done at Edgewise in Stowe (amazing tuning shop that closed), they looked amazing and skied really nice.... but in the end... it wasn't worth the $$$ for recreational skiing.... more cash for trips and skis. IMHO