I don't have an answer for the M.2 SATA, but I do have a current ThinkCentre M720s running. However, it's got serious issues you should know about.
The USB is completely non-functional. You will not even boot the install media until you add real USB 2.0 hardware.
The machine cannot reboot. It hangs instead. A fix is being developed by Arca Noae.
Sound does not work. You should be prepared to use a USB Audio adapter.
The installer will not see the network unless you use ArcaOS 5.0.4 or later.
http://www.blondeguy.com/computer/humbopeep.htmlModerator's Note: Neil, I fixed your link, it was pointing to a local file.