On 12/29/18 7:43 AM, William Gothberg wrote:
Shouldn't we have faster microwaves by now giving out a few kW?* They
were invented decades ago.

Pretty much the same reason one doesn't always turn a conventional
oven up to broil. 350º F. is a pretty common setting if my memory is
working.
T4 has a good example.
It comes down to lack of demand.