LOL
Before you do such statements, (and before any benchmarks), this is HEDT platform.
On X399 we do not have to pay £200 for Raid 1 or £400 for Raid 10 dongle, like on the X299 platform
Raid 0/1/10/NCQ comes for freeeeeeeee
What you have to pay for to "unlock" with the X299 is the VROC RAID platform which is a higher end controller beyond what you'd normally get on a consumer motherboard and AFAIK higher end than what comes as standard on the X399 board though I'd have to double check that (EDIT: As above VROC supports bootable NVME RAID which X399 doesn't).
X299 boards have normal RAID functionality including 0,1,5,10 with NCQ support where appropriate through the IRST controller as normal - what is locked down without VROC is RAID other than 0 on the M2M_32G port, etc. Some boards might have more or less restrictions so its worth checking that but AFAIK all boards fully support normal RAID, etc. functions via the normal IRST controller regardless.
X399 doesn't support bootable NVME RAID. Might want to check your facts before getting up on the defence.
Might not be a case of needing to check facts as such - seems a small number of posters lately are knowingly spouting incorrect pro-AMD and anti-Intel or anti-nVidia information who have previously demonstrated a level of knowledge and awareness that makes it unlikely they don't know or even previously commented or posted on the subject demonstrating they know or should know what the actual facts are.