I wonder if, in the parallel universe where IBM implemented bus-mastering for MCA, they would still be in the PC market. Just about all the other PS/2 upgrades

I wonder if, in the parallel universe where IBM implemented bus-mastering for MCA, they would still be in the PC market. Just about all the other PS/2 upgrades were adopted; VGA, PS/2 mouse/keyboard, 72-pin RAM.