I like that you improve on the underlying database error messages, as they are really unhelpful, and I think this is a great place to add value.

I've been keeping track of a few dbt alternatives. Dbt have opened up the market to this use case, while only partially solving the business model and maturity side. Here are the more interesting ones:

sdf.com (ex Meta team)

sqlmesh.com (relatively new)

paradime.io (more an IDE)

cloud.google.com/dataform (GCP only)