[not_a_terrorist]

> design trends

You are hitting your nail straight on the head, my friend.

Main culprit is: Unfinished ceiling/metallic ceilings (usually corrugated steel pannels, either square or triangular profile pattern).

It's very trendy now to have exposed mechanical equipment and venting, people do not bat an eye anymore. Been ok for about 25 years now. Source: me, working in the business, I specifically avoid any public place with such unfinished ceilings. I cannot stand it anymore!