Seriously though, what are the odds that someone has been quietly spending 10s/100s of millions in cloud compute to brute force the keys for old wallets?
Even if that were possible, you could brute force one wallet. Not eight wallets closely related to each other.
Some dude had the wallets on a usb drive. Maybe he mined in the very early days, never really thought of it, and ended up aged and not cognitively aware, his memory wonky.
Recently, he just passed on.
His offspring cleaned out his garage or whatever, found a usb stick, looked on it for photos, and found this.