Problem solving in dreams can be hyper efficient. I once designed an entire web application in the short dreamstate between waking up to my alarm and the second ‘snooze’ alarm. Drew up the solution immediately and then went to work and built it over the course of a month. Mastering that would be so powerful for knowledge workers and artists alike.
I’ve tried the same with music but, while I can create music in my dreams I cannot yet recreate it awake.