I'm on Ubuntu 18.04 (upgraded from 16.04) and I'm still using Unity. Technically Unity is not gone, but it's no longer a default, Gnome is. I've tried Gnome and was very disappointed. No global menu integration which means losing useful screen space for no good reason. Tray icons somehow look squished and ragged. No fractional scaling is a massive issue for me since I'm working with dual 27 inch 4K displays. Tray bar…
Gnome Shell is about extensions, you want something to work differently - find a suitable plugin or write it.
Meaning that it is a fig leaf from the Gnome devs to power users.