Yes, and many planes and jets are glued together too. This isn't your cheap school glue. That said, Tesla's good at fucking up, so who knows what they did wrong. Probably everything.
Nah, it's a solid cheese for eating in bulk with no other ingredients. While I might prefer an extra sharp cheddar, it's self-limiting. You can only eat so much before you just can't do more. And something like mozzarella, while good on its own, just kinda dilutes into tasting salty. Colby Jack is generally available cheaply compared to other snackable cheeses and maintains flavor without overpowering. I respect the choice.
Fair, though I wasn't thinking of machining in this case. But yeah, my experience isn't generally related to food safe stuff, so I don't always think about it. Not too much concern about that on subs, helicopters, jets, etc.
Great for strength, bad for impact resistance. You'd want a non-filled material or at least less stiff filler. Something like aramid (kevlar) would give you good properties across the board for an application like this though.
Because of how the sign bends I read the thing vertically first and got EGOBEWB.