"TOO DANGEROUS?"
The ECU has everything to do with the shade tree and 3rd party...ie everyone other than the dealership. After the warranty period, if the ECU looses memory, or becomes corrupt, the manufacturer will not back it. But in sense, this is saying that we would no longer be able to have ANYONE reprogram a new one for us. Dealers would be the only over inflated price option. This doesn't just concern hacking and "reprogramming" this also concerns chips, aftermarket programmers, etc. The manufacturing world has long tried to squeeze everyone else out of the picture.
Yesterday, we set the timing on a 99 1500 Chevy. After setting the distributor in place it is followed by a computer program which includes the scan tool hooked to the ECU, then idle to rev limiter operation so the process can be set. Since this would now be considered a "reprogramming" if such were written, I would have to haul 45 miles to the stealership to have them do this process.