3catcircus: My group sticks to d20. Here's why:
- We have outside lives. A couple of us have time to learn other systems. Not all of us do. Whether the system existed before we knew of it is not relevant. We know d20, we're happy with it, and we can play D&D, d20 Modern, or some other d20 game that pretty much gives us the happy, and we pretty much know how stuff works by now. If we were all in our teens and this was our big hobby, then yeah, we might have time to learn something else -- or, heck, design something ourselves -- but we don't.
- Support. Surprised that you think that support is a bad thing. Complaining about lots of products being available sounds a bit like the introduction to one of those silly daytime commercials that start "Tired of putting on pillowcases by hand?" and then cut to a confused-looking old woman grimacing in frustration while doing a completely ineffectual job of putting on a pillowcase, all in an attempt to make the PilloWrap 2000 look that much cooler. This isn't coming from somebody who uses a lot of stuff, either. To use Psion's standard, last session I used.... d20 Modern. That's it. That book. And not even all of it. I suppose you could say that I used the D&D SRD as well, since one currently offscreen monster is a rewritten version of a D&D monster, but that's it. No splatbooks, no Compleats, no Area books -- I'm like a d20 Producer's worst nightmare. I bought the core books to D&D, d20 Modern, and M&M, and c'est tout. But if I ever need new stuff, I've got access to it.
- I also like it as a roleplaying system. It does what I need it to do, and when it doesn't have something I want, I can add that in myself (like adding in DC modifiers for performing skill-stuff in a shorter amount of time than normal; no, it's not in the book, but you can look at the way that they came up with most DCs and say, "Hey, sounds like doing it in ten minutes instead of an hour adds +10 to the DC!"). While I personally would like classless, I know that some people in my group need the classes in order to get things to click for them mentally. I've got no problem at all with Level-less, since it tends to make things easier to gauge, power-wise, when constructing challenges to throw at a party.
So if I see a system that is incredibly massively better as a system and is supported as much as I need, it might one day be worth my time to make the whole group learn it. Until then, not so much.