I have a 3 node cluster. Has a bunch of drives, 1TB cold rust, 512 warm SataSSD And three 512 non-PLP NVMe that are Gen3.
(1 Samsung SN730 and 2 Inland TN320)
I know not to expect much - this is pre-prod - plan is to eventually get PLPs next year.
10Gb Emulex CNA is working very well with FRR...