Because people here are scared of Hero and GURPS.
I mean, I figured "The rulebook STOPS BULLETS!" would be a selling point, but oddly, it didn't work.
And, you're wrong. I'm a lot less anti-4e than I was; a lot of the things I was worried about clearly aren't the case, at least in terms of specifics. I've gone from "Never!" to "We'll see how long my current campaign lasts..."
So at this point, my debate is not so much over 4e or not 4e, but about how much I'm going to need to change DMing style to run 4e properly. I'll need to change how I create NPCs, I'll need to rethink basic adventure design/plotting (to the extent my plots are anything more than some scrawled notes about what I think might be cool to have happen...), etc. I might also need to be prepared to put on my long-disused 1e DMs cap and just say "No!" a lot more than I'm used to currently.