It's popups. It's emails. It's constant nudges towards changes in workflows. Most importantly, it's accelerated the slurping of data and aggressive terms of service by an order of magnitude. Sure, in theory everyone wanted your data before, but now everyone wants all your data all the time. They want to upload it to their servers. They want to train products on it. And they want to ban you from using their product if you don't agree.

Depends on the product. Notion, for example, has a "press Space to AI" prompt in the editor. I think it can only be disabled for enterprise accounts.