While I did find Springheel's brushwork pretty questionable, I guess engine performance must also have come a long way during the recent five years, because I can safely say that the kind of performance issues that he's talking about in this video, just didn't happen to me when I fully opened up my basement with all its unoptimized brushwork. The framerate was capped at a nice 60 FPS no matter how I tried, and with visportals on top of this, and the complexities turned into "func_static":s, an uncapped framerate would just be obscene, at least for graphics cards only a few years old. I no longer have any worries about large areas and vistas - I'll just go nuts. It's gonna be fine.
I did it! I finally did it! After 48 hours of frustration and confusion, I managed to finally sort out how to attach equipment to NPC:s properly, and write down coherent instructions on how to do it, both in my manual, and in this forum.
I can finally rest. I can finally eat breakfast.
Spent most of the day learning and writing about AI navigation. It's stuff I already know, but the magic about writing something down as clearly formulated as possible, is that you then see things that much more clearly. You also find what's unclear to you, and then you figure out exactly how things work. I was hoping to get through it all within just a day, but it looks like this will take tomorrow as well, at this rate. There's also plenty of other nonsense I have to get through as well. Everything's a chore.