If you've not had flight problems I'm not sure there's much of a point. In my case we got a bird that had been abused and would fly in panic. Clipping hasn't been a problem. After discussion with the vet, we took only about seven of the feathers. While she can't maintain level flight for any distance she can gracefully flutter down from the perch. There are no other animals that pose a risk for her.
Despite views here, this one isn't as controversial as declawing cats for example. The flight feathers do grow back, so on birds that have flown, if it does't work out, it's just a matter of time. We'll see as they grow back in whether flight becomes a problem again. She's a much happier bird these days (essentially she spent four years living in a cage with no real care other than being fed seed before we got her).