I don't know. I'm certainly not a millennial and I've never had any real issue with ambient coffee shop or equivalent background when reading/working/etc. and I'm rarely putting earphones/headphones on or playing music in general. People probably just have different tolerances and types of tolerances for distraction--not sure how generational it is.
As I've said before, people here pine for private offices a lot but, in my experience, typical workplace private offices have tended to be door open by default absent private meetings/phone calls/some urgent deadline thing.
Even with the door open, it still blocks a lot of ambient sound. Sound also isn’t the only problem with open offices. The other problem is with visual distractions. It’s hard not to interrupt your work whenever the constant stream of people pass by, especially when they greet you
As I've said before, people here pine for private offices a lot but, in my experience, typical workplace private offices have tended to be door open by default absent private meetings/phone calls/some urgent deadline thing.