I’ve seen both sides.
I’ve had a set of Spank rims on Switch hubs for nearly four years. They’ve had the crap hammered out of them around the Peak, Lakes, Ben Lomond, Snowdon a few times, Morzine a couple of times on a mixture of full sus and hardtail. I think I’ve had them trued about once a year, and they’re still going strong (well, ish, the rims are getting a bit tired now) despite countless pinch flats and some sizeable dents.
A mate bought some of the DH rims on Switch hubs, snapped a spoke on the first day in Morzine riding down a link trail (ie. slightly lumpy fireroad) then proceeded to snap and replace a rapid succession of spokes until a nice mechanic man rebuilt them, after which they were perfect.
**edit** and I don’t think I’ve ever replaced the bearings either. Though I might have once.