I suspect the reason it’s rarely used for simplex - I assume that’s what you mean - is because it’s no more effective than FM, less in fact from my initial tests, and far less effective than SSB.
So why would you use it.

Cheers

Tony

There may be no increase in range, and you'll lose the signal at the same time.. or, as you pointed out possibly slightly less, but up until that point, there is no increase in noise.

I'm not saying it's brilliant, but it would be an interesting mode to play with once in a while.. if only anyone used it

No.. I meant via radio. Simplex just means one direction at a time. Repeater use is also simplex - you can't receive and transmit at the same time (well... you can, but all you'd hear is your own signal)

The fact is... you rarely hear any DStar traffic over the radio at all where I live. You sometimes hear it on GB3RF... but not very often. There's a Fusion repeater in Blackpool, and one or two nodes, but generally...they're internet linked, and you hear traffic mainly internet based using it.

You rarely hear DV modes being used in genuine, antenna to antenna communication.

DStar, or Fusion, just means internet for most people.

like I said... A shame.