Will this be the interface that I need?
Mathesar ( https://news.ycombinator.com/item?id=34999774 ) was the last one I tried out but it couldn't support more than 250k rows without crashing and required foreign keys in order to infer relationships. Otherwise it's exactly what I want. An Excel/Airtable interface around a raw database connection.
How does Outerbase compare?
Edit:
Mistypes
Mathesar core team member here. I don't want to distract from Outerbase's launch, but if you have time, would you be able to open an issue for the crash at https://github.com/centerofci/mathesar? We're still in alpha and relying on people checking out the project to report problems like these so we can fix them.
Also, relationships without foreign keys is on our roadmap: https://github.com/centerofci/mathesar/discussions/2276