There all those things you have to set each time you get in the car that won't stick, e.g., auto hold, cruise, custom mode, etc. Some day, perhaps most of these will be selectably sticky. I went deaf in my right ear about 12 years ago and wear a hearing aid. (I have always said it really isn't an affliction, it was a reward for being married for 60 years.) I got a new hearing aid that has several programs available, including one with noise cancelling and one for conversation. The conversation boost converts high frequencies to lower frequencies so consonants can be heard better. It really helps for normal conversational use. But it does really bad things to music and for some reason particularly with the Stinger's sound system. So in addition to all the other settings to be made before hitting the road, I have to switch to a different program.