The problem for some people is the open layout inhibits collaboration. Nobody wants to start talking because it disturbs others. Whereas if you could just walk into someone's office and close the door you'd feel free to yak away.
Open office is for 2 people 'collaborating' vigorously or trading weekend stories and the rest either bearing all that 'collaboration' or trying to drown it out with an earphone/headphone.
We have "pods" where each pod has 10 desks (with monitors/standing desks, etc), five along each of the two outside walls, with two long tables and TVs on wheels between the desk-walls.
We each have privacy (and our own seating), but the collaboration is always available and not overwhelming.
I dig it a lot more than the cube I had at my old job.
I work in an open office. The only thing that bothers me is people doing the "fake whisper", where they talk in a regular volume but with a strained whispery voice. Just talk normally, it's easier for both the listener to hear and for other people in the room to tune out.
I find it difficult to tune out normal talking (also, extra loud talking). I especially appreciate people who can talk normally while at the same time reducing their volume.
I'd say it encourages collaboration moreso. It's way easier to get somone's attention and get a quick clarification, although in this day and age I'd probably even Slack someone sitting next to me rather than talk.
For long discussions that's when you book a meeting room.