Hatches can now be trimmed just like many other AutoCAD objects. The only catch is that you must select a boundary for trimming (you can’t hit enter to select all eligible objects). If the hatch was already associated with the original boundary (i.e. you could stretch the boundary and the hatch would follow), it’ll also be associated with the new boundary. For hatches that are already non-associative (missing or detached from their boundaries for whatever reason), this can be a much faster method of editing them than deleting & recreating.