Here is the text of a post to reddit from Feb 2017, discussing a similar
idea, and wondering if it could reduce the incentive to delay broadcast of
solved blocks:
# How an anchored Proof of Stake Sidechain can help the Bitcoin main chain
# Steps:
1. Soft fork Bitcoin to enable side chains
2.
On Tue, Jun 20, 2017 at 02:01:45AM +0800, Wang Chun via bitcoin-dev wrote:
> There has been proposal to change the PoW in case of potential 51% attacks
> from malicious miners during a fork. But such a change in PoW renders
> multi-billion-dollar of ASIC into worthless. which hurts economy so much
