Stadiums still appear to be popular at tracks that have an active electric class. I to like the scale appearance of buggies better, but the handling on tracks that get pounded by 1/8's is in the stadiums favor.
If you have an active nitro stadium class, try going brushless and lipo and see if they will let you run with them. I have heard of guys doing this, kind of an open class thing.
I would like to see more offerings as well, but seems everyone is more content with making RTR entry level trucks instead of a racer.