I have not had a single instance of a computer problem with any of my equipment, on or off road dating back to when it first came to be. Actually I have had minimal problems with all of it.
On my P/U I am getting a 70% increase in fuel economy with way more power with a smaller engine, on ethanol to boot.
Current New tractor, some electronics, no computer controlled injection, zero problems since new in '07.
'88 Ford 150 p/u, mechanical emission problem and one fuel sending unit failed; paint failed....but Ford repainted it and fixed the problems in '90 for free. Some kind of customer kindness program...bad publicity on their water based paint which was new then.
'98 Dodge (Ram) 1500 p/u, one A/C seal.
'05 Dodge 1500 p/u, nothing.
'07 Dodge 1500 p/u, turn signal switch (concurrent ownership with the '05)
'11 Silverado 1500, nothing.
The above speaks for itself. Manufacturers are serious about quality these days.