Great write up Stiian, sounds pretty similar to my setup… well done, it took me several years to get to that point!
I’ve been out of it for a while too, but this whole isolation thing has somehow bought it to the surface again.
Here’s pretty much where I’m up to:
Don’t be fooled by the basic mountains, the underlying system I’m testing here is super sneaky powerful for a bunch of tricky reasons 
Having said that, the lod popping is awful so for the next month or two my main focus will be crawling through my code and scrubbing it to the bone, then implementing a new LOD technique with much better (and smoother) density.