The problem is that some vendors don't participate or care about the KABI program. They have their reasons, maybe the cost is too high to maintain RHEL compat

The problem is that some vendors don't participate or care about the KABI program. They have their reasons, maybe the cost is too high to maintain RHEL compat and upstream compatability, so they simply choose the one that is the least pain to adhere to when a customer requests a fix. If companies talked to partner engineering about their kABI requirements, I think there would be a lot less breaking however I'm sure that i'm oversimplifying the reason that they cant or wont do this. I completely understand that the work is non-trivial and that they have many environmental pressures that affect their choices. The KABI is the olive leaf, they can take it or not.