Ok let’s look at this for a minute

If a commercial beek rotates old comb as needed and switch to SC in the process. And does everything else the same like treatments...

This should not cost the commercial beek any more money or work. Five years down the road the beek will have all small cell and the option to skip a treatment if they want or continue treatment. I would think just to have the option would be a bonus. Maybe skip treatment on 1/4 of the hive each year. Or just continue to treat and have the possibility of allot less mites during a flow and during non treatment times.

Why would a Commercial Beek not want to do that???