Comment by jeroenhd

macOS doesn't seem to care and that's what all the designers use. I'm guessing people think it's pretty?

The dock would also better if it weren't stretched to the entire screen width by default but perhaps Google is planning to use that space for something. It's also possible they're going to remove the top bar at some point, that'd make the UI standard Windows-shaped.

The Gnome trick for the dock is to only show the dock when hitting the Super button which also brings up the virtual desktops and what macOS might call Launchpad (except not full screen by default). Ubuntu likes to force the dock on you the way macOS does, but you can disable that.