If they won't offer their thumb, they go without the warranty - easy peasy on that one.
If appears that during 2019, the production of security print plummeted as it is, by its admission, open to fraud.
Thumb recognition is being looked at for replacing everything such as keys for your front door, car doors, car ignition and even credit card purchase by replacing your PIN. Offering your thumb is going to become a part of daily life.