A huge strength of NocoDB is that it is run as just another service accessible your DB that you own.
I can see Virtual Columns being interesting for reporting-type purposes. The mentioned use case of “notations” on data owned by someone else is also interesting. But again - do I really want someone else hosting my data? I don’t know.
Is the target here then basically shadow IT adding onto other people’s data sources that they can’t get the devs to change directly?