Microsoft would love to do these things, but backwards compatibility guarantees prevent advancement a lot of the time. You would not believe some of the busine

Microsoft would love to do these things, but backwards compatibility guarantees prevent advancement a lot of the time. You would not believe some of the business critical software out in the field. They rely on very obscure bugs being present in order to function, and they sometimes can't be fixed because the source code is missing. Apple has chosen the opposite path, which is to give the middle finger to long-term backwards compatibility, and advance their operating systems technically. You can't run an OSX game from 2002 on the Macs of today, but you almost always can run a Windows game from 2002 on the Windows 10 PCs of today.