I've used the BSS gate as well actually ,that one had midi triggering ,very nice piece of kit
I never tend to use a gate as a noise suppressor , you can always get extra hands around the mixer to mute/fade down unused channels on cue , automation or dsp based noise reduction is easier to set up at the mixdown end . Its all about the subtleties of being able to fine tune the threshhold attack hold decay and range of the source for me , the 'duck' feature on the Ds201 is a great bonus too all kinds of interesting uses , the obvious like radio style voice overs where you want music to fade down and almost be modulated by the presenters voice , that squelched sound is only moments away with with the Ds201 , duck a reverb and you can make it only appear in the spaces of the source material , so like a reverb or ambient mics that only appear at starts, ends, breaks ,fills or middle 8's etc depending on what audio and key source you use to trigger it . I think Drawmer called one of the later models the 'punch gate', its very apt title for what these boxes do , they pack a hell of a sonic punch.
I remember seeing something about Geoff Emericks use of gateing at Abbey Road , was a very tedious business as trollys of extra gear needed to be wheeled in and patched up , they had lots of difficulty with the gear burping and farting too , the DS201 put all the right tools in one box,