We are all overlooking one thing, which is that DB suits were actually ubiquitous in the early 90s. In fact nobody wore SBs for a few years around that time. Then SBs suddenly came back (and were all hard-3, which was weird).
My point being: DB suits are not old-fashioned, or retro, or steam-punk, or anything like that. They are just another iteration of the men's lounge suit, the enthusiasm for which waxes and wanes with the seasons.
A couple of years ago, DB suits and especially DB odd jackets came roaring back - especially at Pitti, where they were paired with tangerine slim-fit chinos, sockless double monks, and humungous beards. Was this a good thing or a bad thing? Your mileage may vary. Certainly it was an hilarious thing.