Ugh, it's so much noise for your neighbor though. I worked next to someone with an old IBM keyboard for a year and was grumpy the entire time. Couldn't find headphones strong enough to cancel out what sounded like someone shooting an automatic weapon in the office.
I think there's a happy medium with the quieter cherry switches. But yeah, I don't use a mechanical keyboard in settings where I'm right next to other people.
And I've found that you start wanting to type faster, to create even more noise. So it might actually make you more productive, in a weird way.