That's probably something I would see "on-top" of Notion. I really like the formulas on steroid, but having another tool inside the company is a bit painful. Notion team could authorize add-ons built on top...
Seeing what's happened with Figma, I think it's important to have at least one other major player. There's always a market for an alternative to <dominant player>, and they are more suited to smaller companies looking to reduce expenditure that can tolerate a maybe less mature (fewer integrations etc.) and less familiar product, but with a better support turn around, and maybe even a stake in driving product features
If this is lightweight AND has these cool data modelling features then I'm on board.