I’d guess it’s also because it’s not as easy to ask your random question to a coworker when they’re not sitting next to you in the office.

I felt it became easier with slack.

The culture to use slack as documentation tooling can become quite annoying. People just @here/@channel without hesitation and producers just also don't do actual documentation. They only respond to slack queries, which works in the moment, but terrible for future team members to even know what questions to search/ask for.