As a millennial who has worked in open plan environments all my career, open plan offices are pretty good, so long as you've got headphones. I've got no problem with people interrupting people of they need me, but otherwise the noise of people chatting about things is completely drowned out by the music. The benefit is that if you've got an issue that you can't solve yourself you literally just have to just walk across the room at most to ask someone, which reduces the friction of doing that and thereby increases the likelihood hood of me doing it, meaning I spend less time blocked on solving a problem that others have solved before.