I remember there definitely were some problems with certain system applications. So it did not come and go without any problems at all.
The Bellingham, Washington pipeline explosion (3 kids killed) was partially due to “Y2K”. They had replaced remote indicator switches on the valves to be Y2K compliant.
They had a problem with one of the indicators on a valve. The computer would say the valve was closed so they would spend two hours or whatever it was for a technician to get to the valve and the valve would be open. This happened three times I think.
The fourth time they said “Oh - that’s just that faulty indicator again.” So they sent the fuel (jet fuel iirc). Except this time it really was closed. The fuel hit the closed valve and then sent a pressure wave back up the line. And it went to a nearby bend in the line that had been damaged a few years prior but nobody knew it.
Pipeline burst and spilled a bunch of the fuel into a park. Two little kids (10 years??) were playing with a lighter that they had found and “boom”. A teen fishing upstream had died from the fumes.
Those two little boys probably saved more people from dying. It exploded in the mostly empty park which was just before a populated area where a car or something would have set it off.