Alright, I think the upgrading is pretty much complete. Site is now super fast.
Sorry for all the down/slow time over the past few days.
It was largely motivated by the upcoming Discovery Channel show on Weather Warfare, which is sure to create a bit of a spike. Metabunk.org and Contrailscience.com are both of the same server. Since it's not especially powerful I've had to finely tune it and add whatever caching I could. The caching comes in approximately five distinct layers, and there's always a chance of something not getting through one layer.
So please let me know if you have any problems, particularly with posts not showing up, images not showing up, or you being logged out.