Add on features to newer vehicle these days are keeping a lot of mechanics working and seeking solutions to multiple problems involving the electronics.

Many vehicles might work with add ons for a while , then when they cause problems ,the typical answer is "It never did this before" so it can't be the add on.

New vehicles do not like add on features not factory installed and have ways of getting even. You not only pay for the add on , but also for the time and trouble to isolate unusual problems caused by them.