Smart move all the way around. From a shop’s perspective it is less inventory to carry. We normally sit on $1000+ of 6″ tires for just one class. From a new racer perspective that is a lot of used, cheap rubber around to learn and practice on.
The used 180mm wheels on the market will get gobbled up for rain tires in short order.
This was a move we had inquired about probably 5-7 years ago – just seemed like a smart move for the sport in the long run.