I don't want instant transactions. Clawbacks are very useful. Now the trick is to get that decentralized which means things like smart contracts? But still I haven't seen a good solution.
Well everyone pays an extra ~3% on all of their transactions for that privilege, plus whatever costs retailers factor in for rampant credit card fraud. I wouldn't consider Visa the gold standard of how financial transactions should work the whole system is very clunky and prone to abuse.