We will extend the list up to 1000 values. I personally believe that if there are more than 100 in the list then it’s probably used for something we didn’t intend it for, but technically 1000 is still possible.
I support the idea that long lists should be managed in a proper tool like a database or a spreadsheet.
In the future, we will add the ability to link external files to projects, so that when publishing a project all the linked external files get published with it automatically. This should simplify bundling various reference lists and tables with a project.