We increasingly get files where e.g. the architectural floor plan is "bound" as a cell. Especially in DWGs this appears thepopular method to deliver files with xrefs included as pseudo cells. (Same you do when you SaveAs a DGN and choose the option to include "references as cell")
The levels in the pseudocells come mostly with a prefix on the level name that show the original file name.
It is increasingly hard to work in those files. Moreover if there are nested cells within.
You can go and "fence out" these cells to separate files and then attach them as reference again.
It would be great to have a function to do this in one go. Could preferably also cleanup (compress) the externalized pseudo cells.