He was a rather clever service tech. Really nice guy. He was here for a door control module wiring issue that he had and was super familiar with the diagrams and was showing me a quick run down of a few things. I don’t see Tesla offering the MCU2 upgrade as a common option rather than a special case situation until they engineer an easier swap. A simple harness adapter would fix the pin swap issue.This might be the first time I see someone claim that a service tech has done an MCU1->MCU2 retrofit. AP2.5->AP3.0 (with MCU2 at this time) have been reported quite a bit.
But the real thing here is why don’t they just offer an MCU upgrade rather than a MCU2 retrofit. Because obviously as Elon has stated MCU2 doesn’t play nice with MCU1 cars. If people are wanting to pay 1-2k for the upgrade, just sell a modified MCU 1 board (less likely) or better yet new MCU 3 that is a little faster than MCU2 and light years faster than MCU1.
But making people want to upgrade the entire vehicle instead of a part will always be a piece of the business I guess.