I mean, there are instances where firmware adds/removed some features. On my 12" UC4 I was able to enable off-road/performance pages when I updated to 39.7 app version. Also messed with the heated steering wheel settings to get 3-level heat on steering wheel. Once I "updated" to 40.1, the most recent one I have seen, I lost the off-road/performance pages, and also the three level heat on steering wheel no longer works. It's back to just on/off. Granted, none of these were factory features on my truck, and took alfaObd tweaks.