There are a few now, though they're still a minority, we have a Sharp SM327FHS which has the same arrangement - flat bed with a hidden rotating emitter. Seems

There are a few now, though they're still a minority, we have a Sharp SM327FHS which has the same arrangement - flat bed with a hidden rotating emitter. Seems good so far. (It does not have the physical dial though, it has buttons like most other microwaves)