I run Xmonad with no status bars or anything and it works great. No clutter, just the windows I want to have there. I tried it out as an experiment on my laptop to get more screen real estate and then I carried it over to my next desktop install. I used to think that it was obvious that there were things I wanted to have visible all the time, but in reality there was really only one thing that could even qualify for that and that was a clock. When I realized I could do without that, even, I decided to skip status bars entirely.
The effect is what the article is seeking, without the pain of "Oh, but if I want to do this thing I can't". Free with workspaces that can be used for anything, meaning you don't have to deal with this "It opens up on top of everything else, making multitasking useless".
There were a few 'solutions' that I was content with. You can have a workspace where you have these things (htop, other monitoring tools) and you can also have it in your vim/emacs status-line if you want to keep track of it while working.
I've never actually found that I need something _everywhere_ as much as I need to have it _somewhere_. Monitoring of things like these included.
Edit: I hesitate to call them real solutions, because obviously they are not for everyone. Some people need to see their CPU/RAM usage, network usage, clock and battery level at all times.
The effect is what the article is seeking, without the pain of "Oh, but if I want to do this thing I can't". Free with workspaces that can be used for anything, meaning you don't have to deal with this "It opens up on top of everything else, making multitasking useless".