Originally Posted by sideeffect
That sounds more sensible.
There is also a rumor that B350 won't get updates for Zen 2 but x370 will. Looking at Asus new BIOS releases the X370 Prime has a new BIOS Update AGESA 0070 but there is no such updates for PRIME B350-PLUS or TUF-B350M.
I hope this doesn't turn out to be true. Can you think of a reason why a x370 motherboard would support features that a B350 can't?
biostar has released bios with new microcode for B350 motherboard