Not every app has a hamburger menu indeed.
But it’s a clear trend. Included for full-featured apps. Even KDE is now offering hamburger menus as a choice.
Pixel saver is not as polished as Unite because in Unite you don’t get the inconsistencies you were mentioning in another topic. And it has 2 dozens options to make it exactly the way you like.
Also, and it’s the icing on the cake for me (cerise sur le gâteau ), you can grab the window from the empty space in the titlebar/panel with a huge grabbing space (when you don’t have global menus, and with an extension to send the clock on the right) and drop it for unmaximizing while you have to double clik on a specific area for Pixel Saver. I remember mentioning that almost a year ago already.
See screenshot of unite, With Pixel Saver you have to double click on the Firefox label (not as large) to unmaximize. With Unite, you can grab anywhere between Firefox and the first icon on the right and drop below to unmaximize. It feels very natural.
Budgie Pixel Saver is already great, I’m not complaining here. But for me Unite is next level.