Why a single exchange can trigger adoption of BIP101
He has several good points:
1. Exchanges, not miners give Bitcoin coins value.
2. MIners are naturally very reluctant to change their software or initiate changes.
3. He makes the point that this has been done before:
4. For the long term good of the Bitcoin network exchanges should not relinquish their power.Exchanges, not miners, have the power to decide which fork of bitcoin is the canonical chain, and this principle has been demonstrated in many altcoins. Cryptsy, for example, singlehandedly reverted an attempted fork of Elacoin by refusing to upgrade its nodes to the new proof-of-stake code. In bitcoin's case, even if miners adopt a different solution, their blocks would be ignored by BIP101-adopted exchanges - and coins that are not listed on any exchanges have no value.