A view from the "other side"

"Here's the thing -- When you're incorporating third-party *anything* into your products, you absolutely *need* this sort of process to keep track of what you are using or shipping, regardless if said third-party stuff is copyleft, opensource, or something else entirely."

This. Also speaking from the compliance-within-a-big-software-company perspective.

Having a comprehensive software bill-of-materials is also important for minor issues like, say, security vulnerabilities.

There are many reasons not to account for the components used in software construction.

In the commercial environment, all of those reasons are bad.