I agree that it totally depends on market. I grew up in the Westchester NY area, where full care board included unlimited free choice hay, grain 2x a day, stalls cleaned 2x a day, holding for vet/farrier, blankets on and off, turned-in/out. Bathing, hooves picked, fly spray, etc. The works. However, we paid a premium for that service and to have the luxury of not needing to worry about a thing when we left the barn. The horses received immaculate care catered to their every little need (or reasonable owner preference).
I now live in rural upstate NY. The cost of living (and keeping horses) is much lower, but the facilities available and the amenities provided are also very different. Current barn is an absolutely lovely facility, but the standard of care is quite different. Full care here includes free choice hay, stalls cleaned once a day, turn-in and out. Blankets on and off are an additional monthly fee. Owner is responsible for providing all grain and supplements, arranging vet/farrier appointments and being there to hold for them. If you want night check, you do it yourself. If your horse needs meds, you either do it yourself, pay a daily fee, or set it up so it can just be added to feed. It’s not unusual for a boarder to be asked to clean their horse’s stall to save the BM time doing chores. That said, the board fee is literally a quarter of what we paid in Westchester. So different cost = different services provided.