As I said elsewhere in this forum
I remember when XP came out. The uproar and arguments from those who didn't want to lose Win 95 or 98 was tremendous.
And just a few years earlier was the move from Windows 3 to Windows 95. That was a step change in the OS GUI and also under the hood, and if you believed everything you read and heard then, you would have bet your house that Win 95 was going to fail. My colleagues at work were adamant they would never get used to it.
Strange how things work out isn't it?