I agree that the timing is uncertain. But my uncertainty is only based on the uncertainty of battery supply.I personally doubt megapack production will ramp as fast as he suggests in 2023, given the recession and macro economics. I also expect margins to rise on megapacks but not quite so aggressively and quickly.
Tesla energy is certainly starting to turn the corner, and I think within the next few years we will see it become a very meaningful part of earnings. It might take a bit longer yet to climb that bottom part of the exponential curve though.
IMO, there is no uncertainty in Tesla Energy that is due to macro. The IRA is making sure that it's advantageous to purchase megapacks ASAP. And besides, by the time Tesla Energy gets through their backlog, the recession will be over.