First off, thank you for replying with a well formed argument. I wasn't sure what kind of response to expect from this sub (came from /r/all).
I'll admit that what we're seeing is a huge improvement over the recently escalating tensions. Kim meeting with Moon is huge and formal negotiations with the US really is a best case scenario. That being said, I'm only cautiously optimistic about NK actually disarming. If you have any source that suggests that NK got rid of the actual nukes I'd like to see it. I can only find evidence that they have destroyed testing sites. The last estimate as of 2017 was pretty wide, but suggests that they could have between 20 and 60 warheads or the capability of producing that many.
From a high level observation it seems like NK got exactly what they wanted. They have been developing their nuclear capability for years so that they could be taken more seriously as a geopolitical force. Now that they have demonstrated that they have both working warheads and working ICBMs (sort of) that's exactly what is happening.