Well if anyone has to proclaim they’re an expert in something, chances are they aren’t.
And besides. Here’s a video proof of it all inside of my base, (Notice the FPS Counter top right) And the game is capable of being 60fps in my base with all the thralls and decorations when it chooses to. And it does this once a in-game day/night cycle. There’s a small window of timeframe when the game will be at 60fps. And then it dips in half for whatever until the next day in the game.
Again, nobody needs to proclaim to be an expert and to see a pattern in the engine here, There’s something bugging or glitching out with the post processing or shaders or something or memory.