For me, I can do a lot of things - when I'm very proficient (it feels like a skill that can atrophy like any other skill can) I can conjure entire worlds and scenarios I'd never be able to simulate in real life - I can have sex with who I want, I can go to the top of a mountain, I can fly. This stuff is occasionally useful for my creative writing. more practically though, I've been using it lately to access memories that are usually very difficult to access in my waking life due to severe trauma. it's been very useful for that.
Hmm, ok. I lucid dream, but I can also daydream with nearly the same clarity. I use the daydreaming for most visualization and memory recall use cases. I could see how vivid dreaming could be used instead of that.
