I will agree that floating floors are more work, as you have to mount any heavy objects off the floor and then install trim around the perimeter to cover the expansion gap, but I don't see that has a "don't use it".
As an example, our cork floor is 10.5 mm thick. I raised furniture, captains chairs, etc on 1/2" plywood cut 3/8" "smaller than the outer dimensions" of the furniture. So the flooring goes under the furniture, but is actually still floating. The other option is to leave a gap and then trim with quarter round. In fact, Dianne is out in the garage right now putting the second coat of stain/polyurethane on the quarter round.