[pointhi]

I'm the creator of the Altium importer in KiCad, and yes, importer development is time consuming but important for people without access to those programs. I even looked into Allegro and reverse-engineered initial bits, but without access to those programs it is practically impossible to write something meaningful. At least for Allegro, you can export to Fabmaster and import it into KiCad.

It's also easier to write importers for the ASCII file format than for the default binary file format, but for the former one the user needs to have access to the proprietary program to export it, which makes them unsuitable for some use-cases.