I see an order of magnitude higher prices than 990 PRO / SN850X (and almost 9100 PRO / SN8100). While Optane seems to perform "only" 4 times faster in 4K Q1T1 (read) and 3-4 times faster overwriting the whole drive as quickly as possible (any use case for the later besides restoring from backup?). It looks like in less synthetic benchmarks the difference becomes more significant (only for the very last Optane P5800X).