Cabal have no brains to develop anything by themselves. So there is no way they could own and control it.
Technology is not the thing you could hide for a long time. There always will be traces of its parts in many areas. If there is no such traces anywhere, then there are no any "secret advanced technology".
The only way cabal could kind of "have" something is when their masters gave it to them as finished devices, but only under their masters control and supervision. Cabal doesn't own it. And it is not very clear then why would cabal masters will ever give such things to cabal. Show them to cabal puppets - may be. To intimidate and bend cabal. Transfer it to cabal - highly questionable. Nobody knows disgusting, traitorus and fouly cabal nature better than their masters. Masters will never trust cabal.
And any unauthorised use or attempts to study such tech will spread multiple traces in human science and tech with unpredictable consequences. None of that happened.
And where is it?
Cabal have no brains to develop anything by themselves. So there is no way they could own and control it.
Technology is not the thing you could hide for a long time. There always will be traces of its parts in many areas. If there is no such traces anywhere, then there are no any "secret advanced technology".
The only way cabal could kind of "have" something is when their masters gave it to them as finished devices, but only under their masters control and supervision. Cabal doesn't own it. And it is not very clear then why would cabal masters will ever give such things to cabal. Show them to cabal puppets - may be. To intimidate and bend cabal. Transfer it to cabal - highly questionable. Nobody knows disgusting, traitorus and fouly cabal nature better than their masters. Masters will never trust cabal.
And any unauthorised use or attempts to study such tech will spread multiple traces in human science and tech with unpredictable consequences. None of that happened.
So, cabal does not have any advaced tech at all.