I like running 2wd and I was thinking about getting something new for this year after selling my Yokomo YZ2 at the end of last year, I got a new car but it's a re re RC10. I don't like all the different variations on 2wd at the moment. If I had picked a new chassis I would have went for a B5M and that's what I would have used in wet or dry conditions no need for multiple cars.
The old RC10 went well against modern cars a couple of weeks ago so I'll be sticking with it for the season.
Nobody is forcing you to have a perfect car for every possible track condition, it's toy cars, turn up with what you've got race it and have fun!