The key feature of MSDOS 2.X was user installable device drivers. This made it possible for hardware manufactures to include their device driver on floppy disk which could then be installed on the user's PC via a simple batch file. CPM requred rebuilding the code in order to install new hardware. So did Unix. From a typical user's perspective, MSDOS 2.X was an open architecture for hardware.
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Why is it that a Hubble repair mission to near Earth orbit is considered more risky than a manned expedition to Mars?
The key feature of MSDOS 2.X was user installable device drivers. This made it possible for hardware manufactures to include their device driver on floppy disk which could then be installed on the user's PC via a simple batch file. CPM requred rebuilding the code in order to install new hardware. So did Unix. From a typical user's perspective, MSDOS 2.X was an open architecture for hardware.