But they also could be recovered on a long enough time frame
I dont know if I agree. If I make a key and use it to generate addresses at which I receive some btc and then I accidentally destroy my backups, the only way to recover the btc would be to crack the locking script. If that happens, doesn't that imply that all bitcoin locking scripts are crackable? If we can recover lost btc it implies we can crack any bitcoin private key.
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In reality you're right, I was speaking in hypothetical of "on a long enough timeframe" which could be thousands of years.
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