Taste runs on a cycle, and the vintage design revival you're seeing now is just its latest turn. A generation tears out what its parents installed, calls it dated, and puts in something new. Its children grow up and hunt down the very thing that got ripped out, paying a premium to put it back.
Watching the cycle in a salvage yard
A salvage yard is where you watch this happen. Victorian ornament got stripped out wholesale by mid-century modernizers who found it fussy and dark, which is why so much of it landed in yards, and why it later turned sought-after once the people who hated it had moved on. Mid- century fixtures got pulled in their turn by owners chasing later looks, and now they're the thing a younger buyer wants most. Each wave throws out what the next wave will chase.
The cycle has a length, roughly two generations. That's about how long it takes for a style to stop feeling like a parent's house and start feeling like the past. Nothing looks worse than the recent past or better than the distant one, and a style has to cross that gap before it comes back. A yard is where things wait the gap out.
If you're buying, don't try to game the cycle. Just know that today's overlooked category is tomorrow's premium one, so patience pays and the contrarian does well. And the fixture you love is riding the wave whether you think about it or not, which is the argument for buying what suits your room rather than what's peaking. A piece chosen that way still looks right after the wave has moved on.