Devonthink[1] seems like a good personal database, but it's Apple only. I'm in a situation where I'm trying to coordinate a few academic projects with people from multiple institutions and I have yet to find a tool that supports our need. If Basecamp had better integration with Google Docs and Google Sheets, it might work. However, the need to have multiple people review and comment on MS/Google Docs leaves the team with project artifacts scattered all over everywhere. I'll have to take a look at Notion.

[1]https://www.devontechnologies.com/apps/devonthink