The new DIMMs Intel is putting out have a RAM cache in front of the optane memory that will absorb all the churn plus a wear leveling algorithm on the writeback side. It has big enough capacitors to put all its data away in the event of power loss.

https://www.storagereview.com/intel_optane_dc_persistent_mem...

All of which looks to solve the wear problem even if it means higher price and latency.