Now the industry has long been keen to divert hand baggage to the hold, especially as most have now found some way to collect additional revenue from so doing
Surely it's the other way round - the charge was to discourage hold baggage so as to speed up turn round times and reduce costs. The growth of carry-on wardrobes and the scrum to force them into overhead bins is one of the dispiriting things about modern air travel, the fewer the better.