A few more than one, but it has been a lot less than when we were dealing with spinner. I think I requested about one or two replacements a year, a far cry from the one a week I was doing before.
OK, I stand corrected. We lose one or two NVMe drives per year :)
Our first batch of all nvme machines had SSDPE2KX080T8, they became harder to source and we moved to SSDPF2KX076T1.
With Intel no longer in the ssd business I believe we have some Micron MTFDKCC7T6TGH and MTFDKCC30T7TGR. And as mentioned in the blog post we've recently purchased some Solidigm D5-P5336 which are 61TB monsters.
Here's a fun related story. Our supplier had so much trouble finding SSDPE2KX080T8 that when we had exhausted our spares, I had to sync everything off a machine, tear it down and pull its drives for spares and rebuild it with the smaller SSDPF2KX076T1. Then we had lots of spares