not apps and not running there, but we bought a NAS for our really small compute cluster and just put 16 cheap (=marketed as read-intensive) NVME drives in (wel

not apps and not running there, but we bought a NAS for our really small compute cluster and just put 16 cheap (=marketed as read-intensive) NVME drives in (well, originally 8 – but then there was money left, which had to be spent fast), because IOPS are magnitudes better than HDDs and for around 3 times $/TB the hassle of configuring some caching just wasn't worth it in our opinion. Performance on par with typical Desktop-SSDs over NFS (multiple clients possible). Definitely better than the old 1TB/disk-RAID5.