Sometimes, a website that I use frequently will have an important visual check. Recently (in recent years), the tendency seems to be to eliminate dividing lines and reduce the contrast. Personally I find this tendency quite annoying. I think it makes the interface much harder to understand / understand because there is nothing to guide my eyes, just random things that float in space.
Is there a legitimate reason to do this, or are all these companies simply abandoning a good user experience in favor of the "cool factor"?
Case in point, Google Sheets. It was updated a few days ago with a new visual design, and although I'm sure I'll get used to it, I immediately found it more difficult to see what was happening. Here are a couple of screenshots that show the difference. Is it me or the sidebar of the second screenshot does not have the feeling of being separated from the main spreadsheet?