Make it easier for users testing the beta's

I’m using the beta, but a client needs me to deliver in the official build. The problem is that after opening or appending from 2.81 to 2.8, a lot of the materials have undefined nodes.

A good idea would be an official importer which can succesfully import from beta’s by converting new nodes to old nodes. Geometry’s not an issue, that can be collapsed if necessary before importing, but materials there’s not much you can do after import, even with scripts?