This is great. I'm not a front-end dev but I have a low-traffic personal site where I like to experiment. One of my hobbies is to find out how small, lean and compatible with old browsers I can make it, while still looking modern-ish (very subjective I know) and with _some_ interactivity that can degrade gracefully.

So far it's pretty much usable in IE6 and Mosaic 2 (1993).