I started with rotary in the late 90s. I have six of them including what I believe is the worlds best one. Ultra low speed to 1500 rpm,30% fiberglass bodied trigger less machine.
i use them for orange peel reduction or removal without a single hologram, haze or marring. For correcting the worst defects and jewelling at well under normal speeds and applying paint sealants without hologramming
Whilst I also own plenty of DA's and use them a lot, the rotary is still the king IMO. The days of burning paint (pad burning it) are pretty much over and their a very safe tool when used with common sense.
the slicing action of them can give a different look than a da but I do love both types of machines and can't wait to see the future with adjustable orbital throw machines and maybe offset da and rupes making forced rotation and random orbital in one units or linear machines