It's used for equipment towed behind a tractor, and when you have a header on the front of a combine, you have additional requirements that the ISOBUS standard doesn't support.
There have been extensions, called TIMsthat have been asked for, but the OEMs are resisting that, and they're moving to the ability to close and own the value chain at the exclusion of all other third party participants on their platforms.
It's a commercial decision. We know that from the horse's mouth. We've debated it with them, and they're not accepting of changing course, so we're stuck in this. Shy of legislation, there is no recourse for implement manufacturers.