I would like to enable in Dynamic Page List 3 extension the ability to create a list with all possible categories
As response to above, yes I do believe we should put a max cap on categories, as for everything DPL queries to display (either DPL (Wikimedia) or DPL3), it must query the database, which not putting max caps on stuff like this puts a huge load on our databases.
Ok then could we set a maximum limit like 20 categories? And one other question. Is there also a problem with appearing all the possible results? If yes and considering that the use of DPL in our wiki should produce maximum 1000 results can we also set a limit?