For Mac users it started with macOS 11 about 4 years ago when this drastic “aesthetic user experience” change was introduced - item spacing on main menu bar and most window toolbars increased by almost 50%, most UI buttons lost their borders and all UI items lost their contrast. How this concept is making its way into professional software tools is just awful.
Best example of this offence is what happens on disabling “inline comments” - after this one object takes about 3 lines worth of space when compared to Winbox 3 layout, while it should be expected to take 2 lines.
Sacrificing functionality to “design” in this way is a sure way to make the product worthless and useless.