2WD is far more popular at most tracks that I am familiar with but most do have a few 4WD stalwarts as well. 4WD is great fun and I would probably do more but 90% of the cars at the clubs I race at are 2WD so I prefer to race where there are some good battles with the same car.
There is little sign that 4WD is getting more popular but there are always a decent number for the Nationals and Regionals so plenty of racing at that level if that is of interest.
I do agree with your point that there are a lot of choices of 2WD but they are all good cars and have upsides and downsides depending on the track. The DEX210 is an older mid motor design but can be competitive in the right hands. Most at our club have moved onto one of the current crop of cars- the B5M with laydown, KF2, YZ2, PR01 V3 and XB2. But to be fair that is mostly fashion and a bit of following the herd ;-)
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