For Cybertruck they literally built a giant new factory first because they didn't have the existing capacity to build it, and existing factories were better too

For Cybertruck they literally built a giant new factory first because they didn't have the existing capacity to build it, and existing factories were better tooled for the successors to their existing car designs (e.g. Model Y). That new factory (in Texas) is now finished, so... yeah, Cybertruck probably not "smokeware". Just delayed for various reasons, some of which all car manufacturers are experiencing right now. Elon Musk never said he was going to build a Hyperloop. He said "I had this idea, here is a blue paper". Some people (not him) ran with the idea. Solarcity was acquired by Tesla and Tesla (to this day) continues to operate in the Solar and energy storage space as Tesla Energy. You can order your own Tesla Solar Roof with a Tesla Powerwall today if you want.