Speed Control Springs problems of the 2004 Toyota Prius

Within the first year of owning my 2004 Prius I experienced unintended acceleration. In the old days (I'm 71) if you experienced unintended acceleration you would right off check your gas pedal and floor mats. That kind of problem wasn't all that uncommon when you owned old cars. If you didn't find a problem in the area of the gas pedal you would pull off the side of the road and usually find the throttle spring on the carburetor messed up in some way or something along those lines. Well, when it happened on my Prius going about 40 mph on a stretch of road not so far from my home I instinctively checked my floor mats and throttle shaft for interference or sticking. No problems found. I got the car stopped - don't remember how (with years of driving experience you instinctively try things until you find something that works). Anyhow, after that I went directly to mytoyota dealer where they checked it out but found nothing. The problem never occurred again. Now I see this claim that it's not an electronic problem on this drive-by-wire car. I don't believe it. If you think about it, if it happens just one time on my one Prius in thousands of miles of driving, that makes an incident of this sort pretty rare, rare enough to where it's unlikely to occur under controlled tests (it would be infinitely easier to find the proverbial needle in a haystack). Virtually every microprocessor controlled product I've ever used has required a reset now and then. Usually there's no indication of why the product locked up (or whatever). If you use satellite tv, a dss modem, or own a pc I'm sure you've experienced it. Why it should be any different with car microprocessors is beyond me. The answer is for the government to require some kind of fail-safe apparatus on every drive-by-wire car in the future (I see Toyota is already implementing this concept into their 2011 cars). Heck, my life or the life of my children or grandchildren might very well depend on it.