Designers decided that scrollbars that shrink to super-thin columns when not in use were better. Maybe... but often it results in shrunken scrollbars that require extra work to accurately hover over and expand.
Designers decided that gray text on gray backgrounds were easier to read, and there was even a study to "prove" it... which resulted in idiots picking poor contrast choices of gray-on-gray, without understanding the limits on this idea.
I will say that the current push for accessibility is forcing some of these "innovations" back onto the junk heap where they belong. I was annoyed the first time an accessibility review complained about the contrast of my color choices on a form once... but once I got over my ego, I have to admit they were right; the higher-contrast colors are easier to read.