I don't think the XMods are taking away too much from the Bits/Zaps - After all, many of us are drawn to the Bits/Zaps because of the size - xmods require substantially more room (and money).
Heck, I can't even get my superslick upto full speed in my house it's too fast, and as a result too big.
There are a lot of other forums coming around as well, but I think it's mainly a sort of slump right now. We are in between major releases in 1:64 scale, plus the weather is getting nicer and nicer and a lot of us are going outside
