Optane memory is objectively better than flash and a worthy successor. Everything about this technology is desirable except for its price.
Imagine if some car company built the first practical flying car. This flying car promises to:
-Be lots of fun to pilot
-Be safer
-End traffic forever
-Get you to your destination faster
Get yours today for the low price of $1,999,999!!!
Despite being the holy grail of driving, it would never catch on at that price point. I think technologies like Optane and OLED are in that spot. Once the price drops to a reasonable level then there will be no reason to keep the predecessor technologies around.