nomorecatering
I don't believe metals are done. I have a tentative faith in composites, but aluminium has a history, a long one. I've used resin/matrix in myriad ways for 40 years, and am a believer. I think it's a draw for now, only to change with new obstacles to energy, design, and manufacturing process that could hobble plastics.
The only potential fatal flaw in wide use would be maintenance, diagnostics, and service life, also toxic products in fire. Engineering is ahead of the data base for now. What do you think?
rgds.