When should I consider using level streaming?

I’ll definitely watch it thanks. A couple problems I’m already have is how to load a wall and or doors if my level streaming volume intersects with said wall or door. Secondly, rn I can save anywhere in the game but if I save in a streamed level and then load from anywhere but the persistent level, the stream level doesn’t load. I’m positive it’s because my stream volumes are attached to the persistent level. I’m the only person working on my game so I think a simpler solution to the second point would to have “save rooms” that are always loaded and only be able to save there.