I'll chime in with the others to say that "amateur" users still notice, even if my dad isn't calling me to say "Son, why does this new MacOS version have different icons for the `New` action across apps?"

I had to help him "get his bookmarks back" meaning see his bookmarks toolbar in Firefox. He must have hit a keyboard combo on accident. Since Firefox hides the menus by default, I had to tell him to tap Alt to see the menu, after which he was easily guided to View > Toolbars > Bookmarks Toolbar.

Bad UI design for novices is felt, if not conveyed outright.