because it a 'fix' which works, but ofcourse it is not the official way. Programming things into the saab software is a little bit more work and they focus on the brands/cars widely available (this Saab is not that widespread ofcourse). Not that I think it is right, the car is certainly in parts of Europe, seen more then a few times a year (in the shops) but I feel this is the reason (focus time).
Same for new car lines they implemented some time ago; first data is available but in depth software dev. seemed to have halted since trouble come along in the major brands and they do focus and work hard on fixing that.