Windows 8 was an experiment imo and to be fair, all tech companies are doing that. For Microsoft, it turned out to be a failure. It's crazy that typical Windows users like myself can't stand the idea of not having a start menu. haha..... Good thing MS realising it.
I believe that the Start Menu is the best thing to happen to Windows since Windows was released. Earlier Windows versions did not even have a start menu or taskbar. The start menu and taskbar were only introduced in Windows 95. From Windows 1.0, which was released in 1985, to Windows 3.11, released in 1992, there was a thing called Program Manager, which was a solitary icon on the desktop and using that you could access the programs installed. With the Start menu that became much easier, quick and streamlined.
With the new Start screen, I believe that they have taken steps back to the cumbersome Program Manager era, because that is what it reminds me of now. I think M$ put too many eggs in the touchscreen fad basket.