"DOS is ugly and interferes with users' experience"

This quote by Bill Gates is referring to the Disk Operating System (DOS) which was the first os developed by Microsoft. DOS was a command-line based system which required users to key in commands to perform tasks. This was a challenging and unintuitive system to use, and it was not easy to use. As a result, it disrupted the user experience, making it challenging and frustrating for users to complete jobs.

The advancement of the visual user interface (GUI) was a major improvement over DOS, as it permitted users to interact with the computer system utilizing a mouse and icons. This made the user experience much more intuitive and satisfying. As a result, DOS quickly ended up being obsolete and was changed by the GUI.

Overall, this quote by Bill Gates is a reflection of the constraints of DOS and how it hindered the user experience. The development of the GUI was a significant improvement over DOS, and it permitted users to connect with the computer system in a much more intuitive and satisfying way.