That would invalidate any pre-signed transactions that are currently out there. You can't just change the rules out from under people.


On May 30, 2017, at 4:50 PM, James MacWhyte via bitcoin-dev <bitcoin-dev@lists.linuxfoundation.org> wrote:

 
 The 1MB classic block size prevents quadratic hashing
problems from being any worse than they are today.


Add a transaction-size limit of, say, 10kb and the quadratic hashing problem is a non-issue. Donezo.
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