This is a little tidbit question I posted on a comment on the below mentioned question.
"Of course also means it can be used in a (true) dual-personality M.2 slot. It won't work with PCIe, though."
"Just the way there are dual personality M.2 slots are there dual/ triple (SAS??) personality SSDs?"
I got a bunch of negatives on this question of mine but there's still no easy way to find, identify & determine PCIe / NVMe/ SATA properties of an SSD especially those with B + M dual connectors:
Read these and a few more articles as well at the time:
PS: Similar question but no answer posted. We need a SU Wiki for this subject area.
Also mentioned on a comment here by Ramhound:
"M.2 x4 Socket 3, with M Key, type 2242/2260/2280/22110 storage devices support (both SATA & PCIE mode)" indicates to me both AHCI support and NVMe support but that is just me. Now If you want to boot to the device, that ius entirely up to the OS, after POST. "