I'm sorry but I find that article a little BS. We run 8000 series JDs and most things we work on ourselves no need to hack the computer. And if there is something we can't fix the dealer is out ASAP if it's during planting or harvest. For the most part they have been trouble free. We only have one with DPF and you don't even know when it's in regen unless you notice the icon on the display. Sorry you're having trouble with your tractor and hope you get it working right soon.
Your obviously in a more dense populated area that can get fast service. Neighbor had his 9360 sit in the field for a week where it quit. Went down on a Saturday Afternoon, Dealer got their Tuesday and futzed with it for 2 days. Ended up a regional mechanic of some sort flew in and found some $50 sensor gone bad. Farmer ended up planting right around it with his old 9020 as he was up against weather. ANY Mechanic or farmer should be able to access a computer to troubleshoot on something they spent their hard earned money on. Looks like this issue may have been addressed last fall now..... Copyright Office issues DMCA exemptions for automotive software, jailbreaking smart TVs - IPWatchdog.com | Patents & Patent Law