"They've all refused Wright's demands, though a firm called nChain Ltd is 'said to be working on a modification to the existing BSV client software, which would enable someone who owns but cannot access the BSV to regain control of them.'"
Note that Craig Wright is the Chief Science Officer of nChain[0].
It seems cryptocurrency enthusiasts love irreversible transactions until they have one of their own transactions they want reversed, although if you're high enough up the pyramid you can get yourself sorted, e.g. by rewriting the client software (as in this case) or by forking the blockchain (as per Butlerin and The DAO[1]).