AMD has moved to the 3000 series which can run on B350, B450, X370, X470 and X570 motherboards. Only the A320 has been left twisting in the wind.
One problem I am aware of with MSI and probably the rest of the sector is the small 16MB flash memory used for the BIOS is still small to hold all the fluff along with what really matters, CPU tables and memory logic etc.
MSI mentioned a few mothers ago new MAX motherboards but nothing at NewEgg of yesterday.