None of the disorder, none of the chaos, none of the deaths will be caused by computer failure. The coming disaster will be caused by the greed of those who plan on making a fist full of money off the fears of the people during the coming year and politicians seeking power over the minds of men. Everything in the world that is run by a computer has a manual override. This is ignored by those trying to sell you a year's supply of dried food and a water tank to put in your back yard. City water is delivered by the force of gravity, not by a computer chip.
Gas producers have chips fail in pipelines hundreds of times a year.
Electric utilities have software and hardware failures thousands of times a year that sometimes stop power delivery. The FAA's computers fail hundreds of times a year and that is why they have manual systems to guide commercial airliners. In every case there is a manual means of overcoming a computer failure. Most financial institutions have been Y2K compliant for many years because they have had to deal with the year 2000 already. Certificates of Deposit have been issued for more than five years that have maturity dates in or past the year 2000.