I agree with designer's responsibility to maximize "findability" of content - however it's simply impossible to design for every single resolution and size of w

I agree with designer's responsibility to maximize "findability" of content - however it's simply impossible to design for every single resolution and size of window. Until now, at least scrollbar was always there, no matter what resolution (if content was bigger), indicating more content. I agree it's to soon to predict effects of that change, and I'm not trying to do that. I'm just trying to understand what would be the benefits/reasoning behind the decision to change standard GUI element that already worked well.