In many pbix files I reuse the same custom made M-functions. Today I can only do so by opening an existing pbix file which contains that code and then manually copy/paste that query in my new pbix....
I support this suggestion but would like this to be done on the Power BI Service - such that a function can be public (akin to "loaded" for a table- i.e. visible to other dataflows/semantic models) - and that this can be consumed within other dataflows and/or PBI desktop source files.
At present the only way I know to do this is by a custom connector, which does not include all use cases and also requires a Gateway server even if the code within the function does not require it
