phoronix is the yellow press of open source, and michael larabel has multiple layers on how to form dubious technical conclusions, but they're touching on something half relevant https://www.phoronix.com/scan.php?page=article&item=linux418-btrfs-raid&num=1 Phoronix is the leading technology website for Linux hardware reviews, open-source news, Linux benchmarks, open-source benchmarks, and computer hardware tests.

Looks like one nvne per motherboard would be more cost effective

i'd actually claim 2

but depends on the block diagram of the motherboard