Is there a "best practices" guide for switching from Unity to Gnome3 now that Unity is being deprecated?
There are frequent warnings that this switch can be problematic -- leaving one with a disabled desktop if one isn't "careful" whatever that means.
It would seem the safest way to switch from Unity to Gnome3 is, as is frequently given as an answer to similar questions, to use "Ubuntu Software Center". Aside from the fact that "Ubuntu Software Center" is nowhere to be found -- only "Ubuntu Software" -- when one brings up "Ubuntu Software", "Gnome3" is nowhere to be found as an option. If one searches for "gdm", one is offered "GdMap" only.
I've taken one precautionary step, which is to pre-install the 'Adwaita theme' as some Unity themes are "incompatible with Gnome3". How many more "gotchas" are waiting to snare those that aren't "careful" and how can know one is being "careful"?