Sadly there is still no alternative to Notion (it’s not a note taking app, it’s database). Only SiYuan is somewhat close to Notion in its database capabilities, but comes with its own set of issues.

I would absolutely love to self-host real Notion alternative!

What’s funny is that Relational Databases in fact sucks when somewhat complex Relations are involved. Moment you step out the of the realm of Tabular data you’ll have very miserable time. Like good luck modeling and querying simple nested product catalog.

Graph databases are better choice for truly relational data