The new computer age tractors are really great. What I do wonder is if the manufactures will have enough electronic parts in stock to support them for say, 30 years. Tractors in the past have had very long lifes. My 1910 is still running great and it is around a 1982. I hope they are planning for this. I wonder if the market is big enough for an after market company to look at like automotive is.
The big operators won't have an issue because they trade frequently.
We have customers that we have redesigned products for because there are now obsolete parts in them. Usually chips. They keep a stock of old stuff and when it is gone, it's gone. Their customers will have to junk their controls and buy new ones. It is probably easier to upgrade the controls on an old machine tool than a tractor though.
It will be interesting to watch this as the years go by. It is much easier to rebuild a carb than repair or retrofit an obsolete electronic system.