It has been a question for me if this framework has any customer? Considering that OCI didnt pick this up and went with some react stuff IIRC.
The github for it https://github.com/oracle/oraclejet seems to be active, but I do not know if there is any customer for it.
No significant reference deployments in production.
It's just ADF all over again and developed by the same team. They are having the same identity crisis as ADF as well.. is it a framework for external devs to build applications, is it a framework for a business user to build applications with additional tooling , or is it an internal framework for other Oracle products?
ADF tried to be everything to everyone and look how it turned out
Has Fusion Apps broadly migrated to it yet? (I.e., replaced ADF UIs?)
"Seems to be active".
It has one contributor, from Oracle.