In the late 80s early 90s I was against nuclear power, because I saw no reason people/govt would want to off of it until the collected problems were disastrous.

In the late aughts I changed my tune because coal is just too disastrous and indeed, people/govts werent motivated enough.

So while I understand the simple practicality of going nuke to get off coal, I also expect that most of the potential downsides of nuclear will become reality before people will be motivated enough to do anything about it.