[eggsnbacon1]

Useful but not necessary. Anything pointing at the Earth, nearly all satellites, work better closer. The issues of line of sight and coverage are all about money, and the cost of small satellite launch is dropping rapidly.

There are some satellites like telescopes that need to be far from the earth. But the vast majority could be banned from orbits beyond a distance where they won't decay in a reasonable amount of time, with the only downside being cost