I'm quite sensitive to overstimulation but I'm not sure if that's because of my stammer, neurodivergence, or something else. But it does make my stammer worse because I need to be able to concentrate to be in a calm state of mind to be able to speak reasonably fluently. So whether it's bustle in the environment or bustle in my mind, it's too distracting and I find it difficult to clear my mind of conflict, which in turn leads to disrupted speech. I used to work in an open plan office and my stammer was quite severe back then, although my speech improved over time (and with a lot of effort) to the point where I would actually answer the phone instead of leaving it for colleagues. I've found I don't like to be tied to a desk all day, and if I went back to work in that kind of environment, perhaps partly because of the bustling overstimulation in the environment, but more because of my mind screaming to get out and move around like humans are supposed to.