I want the most minimum amount of regulation that doesn’t reason much about the type of media or transport method.

Require clear communication of meaning of words like “purchase” and require software “licenses” to indicate “access for at least 5 years” or whatever.

Basically, “you don’t own this. You’re buying the right to access it for least x years” vs. “You are purchasing a key that is fully transferable and provides indefinite access to this product.”

Then let the market sort out the rest, including buyer sentiment.