My 6-yr-old car 2/ 226,000 miles went in for repair around two months ago for a broken cabin heater. The MCU1 was pretty slow to operate already and I was looking forward to an MCU2 at some point... and praying that the MCU1 would hold on until then!
Unfortunately Tesla Service called me to say "your MCU has given up the ghost while we had it in here for service. You'll need to replace it for $2500." I found myself paying for a replacement MCU1. At least they were able to find me a refurbished one for $1800.
And two months later, they make the MCU2 upgrade available. DOH!!!
I will still get it due to the nice profits from my TSLA stock.