It sounds to me like you really just want someone else to pick a window manager, some tool bars, text editor, keyboard shortcuts, programming language, package manager, IM notification icon, etc, and then never change those choices. That isn't going to happen. Here's the good part, you're already on Linux, you have a bunch of good choices for all those things and the only other thing you need to know is that your weird hangup on a desktop being 'future proof' makes absolutely no sense whatsoever. What is your concern? That you won't be able to sit down in front of someone else's Mac OS 10.n Big Cat alpha and figure out how to open a window without seeking help? If you've been using anything but that for any amount of time you'll probably be a little lost, even if you've been using the current stable Mac OS. Apple, MS and now Ubuntu have all made drastic changes in the DE between releases and that's their choice, it is what it is, someone else picking shit for you, take it or leave it. I suggest going minimalist for a while and figuring out exactly what YOU want. Arch Linux is a good starting point if you're interested. When you find out what you actually need and don't have to work around other peoples choices, you will love your desktop again and it will be a deeper love, a love only known by a parent for it's chi... uhh... Just quit letting people with their own agendas pick what you work with for such a large chunk of your life.