My sole drop-bar bike (Kona Jake) currently has the stock wheels on it with 32c slick tires. The entire drivetrain was replaced about a month ago- crankset, chainrings, cassette, chain.

I was thinking, as an Xmas gift, of a second wheelset, a little bit lighter. Then my cx tires would go on the present one, and the slicks onto the new wheels.

But here's my question: If I was to do the bulk of my miles on the new wheels, and put the old ones on occassionally to ride rougher trails and race (next fall), would switching back and forth between the two with the separate cassettes mess up the normal wear and tear of my drivetrain? I'm thinking the current drivetrain would have 800- 1,000 miles on it by the time I get the second wheelset...