Apple has also yanked backwards compatibility a few times. I bet Microsoft would love to trash a few legacy API decisions from decades ago. That being said, I

Apple has also yanked backwards compatibility a few times. I bet Microsoft would love to trash a few legacy API decisions from decades ago. That being said, I still think Microsoft should have developed a seamless virtualization layer by now. Programs prior to X year are run in a microVM/WINE-like environment. Some escape hatch to kill off some cruft.