It has a ton of downsides like being slow, not having offline access, and no E2E encryption, but there are few tools that execute well on the approachable database concept. I wish there were more, because the standard approach of doing bizarre spreadsheet hacks to achieve the same functionality is much less intuitive to me.
The reason there’s an entire weird industry around Notion is not surprising to most people here: relational databases are useful. Unfortunately, most database tools are too unapproachable or cumbersome for most. Notion and Airtable wrapped a good UX around creating semi-primitive rdbs and here we are.