Wouldn't the training set (until end of 2021) be outdated?

What Apple has perfected over the year is energy efficiency.
The much better memory management hence lower RAM requirements for iOS, the stricter control on background processing, sensor management, processor design, reasonable resolution... all contribute to delivering more processing and usage for the same amount of energy.
What constraints Android phones is battery size and this is why we have seen ever increasing phone sizes without significant autonomy gains. Going small first requires a much leaner battery and this is the reason why Android phones have trailed the iPhone Mini IMHO.

Can someone explain how the 8 months old "withdrawal" is only seen now and required hacking the computer.
Isn't the point of the blockchain you can trace (except through mixers or specific ZKP systems) transactions precisely because every node holds an exact and full copy of the ledger of transactions?
The only thing hacking the computer could provide is private keys to actually transfer value out of those wallets but the balance should have been public.