>I think it's pretty important to maintain the same manufacturing quality between the two areas. I'm sure that's possible when moving production to Thailand, but I expect it will take time for them to iron out their processes.

Nikon have already been making weather-sealed cameras in Thailand for ages (e.g. the D7500). I think your concerns here are overblown. Any quality problems with their Thai manufacturing operation would already be apparent, given that most of their cameras are made there.