DIY Coding
First, not every workshop does or wants to do coding. If they are doing it, even to activate the most basic of hidden features, they are backed up by professional systems, some of which cost tens of thousands of dollars.
Second, whoever can do it, learnt it the hard way. Long before this thread was started, the coding movement was already popular. And it still is. But we often forget the number of rides that went up the lorry and had to be towed back (yes, towed back) to AD when something goes wrong. If they entertain you in the first place.
This is a forum where advice has to be given responsibly, especially when you are talking about our cars here. It all sounds great but do people reading this thread really know what they are getting into before they go out to eBay to buy a cable? Where is the warning to the newcomers above that anything can go wrong once you are inside.