@ReflexFunds estimated "maintenance depreciation" to be around $120m per quarter - which is only a small fraction of the $578m of GAAP-inflated depreciation expense in Q2.
That artificial cost does not correspond to any ongoing business expense, and not having this GAAP expense alone could have pushed GAAP income into the green.
So about 80% of Tesla's GAAP depreciation and amortization expense is not "real".
This is one of the problems with fast growing companies reaching GAAP profitability: their GAAP income is burdened with already paid for expenses, which expenses are scaled up by the growth exponent.
This is why cash from operations is a much better (but still imperfect) metric of underlying profitability.