It might be disappointing if you own an IM, but IM will do whatever it needs to do in the E world to survive. IM is betting the full house and barn on E tech. I wish them luck.
There is no question that any IM should appreciate as the Italia did and continues to increase with age and none of these cars will simply rust away unless majorly neglected after all they are glass.
As to replacement parts it might be fun in the future to get some of the rarer items but then classic cars do have that problem as well.