“There are no engines. There are no spares. There is no certification. There is no support from the manufacturer.”
I think what’s being got at here is that technically speaking someone could make new engines, fabricate spares, spend millions on certification and forget about support. I personally think these hurdles are insurmountible, however others will disagree. They are only hurdles, so could technically it could fly again. In reality with the cost – never as GA said.