DRM vs Property Rights
DRM has a fundamental problem with property rights which is being highlighted by issues like John Deere tractors. At some point IP rights of the owner must be addressed. In the case of a tractor or car, the owner should have the right to repair it using anyone they want. This would imply that the code required can be updated easily by the owner if necessary with possibility of archival copies being available. The current IP laws ignore the rights of the final owner in order to squeeze a couple more out of the poor the sods.