The elimination of the standard menu bar in one application after another is a huge one. Look at Edge: I wanted to save a PDF I was viewing. Fat chance.
There's no menu. In the toolbar past the URL box there's a jagged Pac-Man that I guess is supposed to be yet another "gear" icon. Then there's a star with lines in it for "favorites" and then your own avatar and then three dots with a tiny upward pink arrow overlapping part of one of them.
In the upper-left corner of the window there are more boxy icons... let's see what those are... "Workspaces" and "Tab actions menu."
So is "save file" under Gear-Man, the three dots, or somewhere else?
And BTW, WHAT APPLICATION IS THIS? You have no idea which window belongs to which one, because the title bars are missing.
What a truly incredible, pathetic mess. The Mac's single menu bar is a UI blunder, but NO menu bar is monumentally stupid.