These are optane ssds (not nand like other nvme, sas and sata ssds).
Optane is a type of storage that is pretty fast (throughput AND latency), with low queue depths and threads it is one of the fastest media that currently exists. (Only ram based ssds are faster).
I have another optane ssd (the 900p 480gb) where I have visual studio installed.
Opening a huge project takes like 5 seconds which feels slow. But watching other colleagues via teams opening the same project and waiting 15+ seconds makes you realize how fast optane actually is. For me the "speed" is noticeable.
For home pc (not a server!) bigger nand ssds are probably better (due to price/better bang for the buck)
Edit: for me the expensive price is worth the performance (for the 900p 480gb)