Re: Not wanting to state the obvious
"is far more efficient that thousands of little ones dotted all over the countryside where terrain gets in the way most of the time anyway."
Far more efficient in what way? If you want to cover a large area with homogeneous programming, you're right. If you want to address smaller areas independently then it's not so good.
To take a terrestrial example, when TV broadcasting started Holme Moss (band I) covered both sides of the Pennines and was picked up and relayed to the Isle of Man; in fact I think the Manx transmitter was in turn picked up at Divis and relayed to NI. When ITV came along their band III transmitters were Emley Moor & Winter Hill, east & west of the Pennines respectively so that they could have different franchises. When UHF came along the Beeb's transmitters were colocated with ITV which allowed the Beeb to have some regional broadcasting, Holme Moss band I was closed; these days it's FM on band II. Try to do the same thing with satellite and you end up using a lot of bandwidth to provide different channels instead of the regional separation that a terrestrial network provides naturally.