There are basically two different types of problem in life.
One's that are hard to identify and solve, and ones that are easy to solve, but will take a lot of effort to actually implement that solution. The first type
The millennium bug was a problem of the second type. The problem itself was trivial. Lots of software had dates in a two digit format. The year 00 was going to come after the year 99, but computers weren't going to understand that, because they just see bigger number comes after smaller number. The fix was easy, make all dates 4 digit.
As I said, the fix itself was easy. The problem was that the number of bits of code using the wrong date format were astronomical. The problem was one of effort, not of difficulty.
The hole in the Ozone layer was a similar problem that seems to have just quietly gone away. Except it didn't "just go away". It was another easy solution, that required a lot of effort. The solution was simple. Stop using CFCs. We already had other chemicals that did the job, so the difficult bit was mostly a case of effort, changing manufacturing processes, and governments convincing companies that they needed to do so.
Simple solution, easy but time consuming fix. In both of the above cases, there was an obvious deadline as well. With the millennium bug, it was an actual date. With the ozone layer, there was a great big stonking hole we could see with the right equipment, obviously getting bigger.
AI is a more nebulous threat. The actual risk isn't clearly defined. And the solution certainly isn't. There's no "Stop using CFCs", or "change every date to 4 digits" here. We could stop making and using AI, but that's never going to happen, there's too many rich people too heavily invested in it. Noone had a vested interest in the millennium bug happening. Noone was going to make money from it (aside from in the effort of fixing it). However, a lot of people have a lot of money invested in AI continuing to be a thing.
Do I think AI is going to take over the world or kill all humans? Not particularly. But the problem itself is a very different beast to the Milennium bug. For a start, we haven't even really defined the problem yet.