It does feel high pressure in the moment, but I wouldn't have two published technical books if not for the consistency and push of my editors and the publisher.

Another constraint of a technical book that I didn't see mentioned here was that time almost has to be very limited during the writing process. I worked on a couple mobile development/design books, and an iOS 18 programming and design guide is worthless after Apple announced Liquid Glass last summer. At 2+ years into the project and seemingly only 1/3rd complete, the publisher really needs to be sure the content will still be relevant after released.