I wanted to add a comment specifically about documentation tools. We've always had a lot of collaboration. On an earlier project (let's call it project 0), at t

I wanted to add a comment specifically about documentation tools. We've always had a lot of collaboration. On an earlier project (let's call it project 0), at the same company, back when there was only a few people, we did all documentation in latex with CVS. It was glorious but as soon as a couple of non-technical people joined it was unmanageable and inevitably someone would have to troubleshoot others' environments, usually eventually giving up and manually merging on another's behalf. Then we switched to google drive plus latex/CVS. It was not so glorious using both at the same time for the same files. We quickly switched to google docs only, which I came to love for realtime collaboration (a game changer for remote meetings) and its commenting system. It seems very hard to break linked content, like drawings or spreadsheet cells in a document. Keeping your architecture diagrams in a presentation file and linking them to all of your documents is also a game changer (they will automatically update). Google drive also became much better when TeamDrive was added. I like that by design its permissions are not complicated and hierarchical. It's not possible to deny permissions to a subfolder in a TeamDrive. But old school IT people think this is a requirement. Besides Confluence, I tried Amazon WorkDocs (useless), Office's new collaboration tools (broken) and Office 365 online (not bad but I predict people will just download and work offline meaning 2+ versions in 2+ places). I'm going to keep using google docs while I can but have Confluence ready for whenever strict onsite requirements are enforced. Hopefully someday google docs has an enterprise or more security options. So far there are only options for HIPAA, and not other industry-specific options.