> It's neither open source, nor a free cultural work.

This is where the change needs to happen: "free culture work" and "open source" should not be conflated.

The article you linked demonstrates that the Creative Commons defines a spectrum of licenses [1]. The OSI should as well. They could then "approve" the BSL the same way the Creative Commons "approves" the NC licenses.

It would be better for the OSI to stay ahead of this rather than ignore or fight it. They could then champion their own definition of the software license spectrum rather than risk losing control of it.

[1] https://creativecommons.org/wp-content/uploads/2019/11/cc_li...