Re: My thoughts on this ... @Julian
Before the turn of the century, I liked the version of twm that added a virtual desktop. The version I used was called vtwm.
I actually found the source for it a bit back, and compiled it up. It still does the main part of the job I need a window manager to do quite well (and in an absolutely tiny footprint), but the lack of integration with things like the network manager for wireless keys, no applets and a number of other niggles prevented me from going back to it full time.
I suppose I could have spent more time investigating getting it working better, but I just lost interest. We get too used to the extra luxuries of modern desktops, unfortunately.