Probably just easy to mount and a solid interface to prevent the enclosure from moving while the printer does it’s thing.
You should not have to buy a new key for a machine that came with windows. That will most likely automatically activate back to whichever edition you had before the wipe.
I just got a new Kobra 3 Max Combo, and have been fairly happy with it so far. There are some connection issues with cloud services that are annoying, but LAN mode has been fairly reliable when I’ve had enough of the cloud failings. Unfortunately, it appears that the spaghetti detection requires the cloud services to function.
While I have received my Kobra 3 Max, and two Ace Pro units, the camera that was ordered together has not yet shipped. There is also no 8-to-1 unit to allow both Ace Pros to be connected simultaneously. The support site has a model, but they discount any guarantee that it will function. My order still shows as partially fulfilled, but there has been no communication about when the rest can be expected.