Sony, Nintendo and Apple are as guilty of lock-in as MS is. At least Nintendo, Apple and Sony are part of the Vulkan working group. Whether they'll support Vulkan on their walled gardens - time will tell. If they'll outgrow their petty lock-in mentality, they might. But MS didn't even join. To be clear - I have no respect for lock-in whether it comes from MS, Nintendo, Sony, Apple or whoever else.