I’m talking about UE4. In some maps, working with bsp is… “ok”. But in most of my maps; for example I created a bsp and modified it’s height, width or put texture. But then I hit ctrl+Z and I wait for couple of minutes, most of the time more. So I quit working with them. I’m putting thousands of rocks as foilage, detailed meshes from Maya but the system can’t handle a couple of bsp brushes’ histories.
I found that there are other people who suffer the same. Simply, bsp editing maybe very system specific thing which is bad for it. I don’t know.