you've avoided my question though.
besides, if you've ever did controlled studies, the best way to implement one of these SC's is to duplicate everything about Bitcoin and then add one killer function/variable, like anonymity, to definitively prove a difference. that's the whole purpose of these SC's as Erdogan says above, to create better features. and since both BTC and scBTC will be traded 24/7 they will reach their equilibrium values which WON'T be the same as the chains are by design different. your above theory of equal value doesn't apply b/c of mining fees to convert.
in fact, if there is a rush to get out of BTC and into scBTC, miners are going to HAVE TO charge extortionist tx fees b/c it would be clear that BTC will be going to zero so their risk of mining an SPV proof while being paid in BTC is high.
I've avoided it for the reasons I have stated : I cannot envision that scenario unfolding.
The ONLY killer function you could add is indeed, anonymity. And by killer I mean it would steal part of Bitcoin's market share but nevertheless you would still be left two economies : a white market and a black market.
Of course their value will not be the same because the sidechains in effect are apart of Bitcoin's economy. The value of Bitcoin will be represented by the value of all sidechains combined and of the standalone BTC blockchain.
It seems you are putting forward a scenario that has mostly been dismissed ever since it existed from the presence of altcoins only because of your pessimism about sidechains.
i've given you a very plausible path to a scenario that could hurt Bitcoin. you can choose to hand wave it away, but i know human nature and if there is money to be made, ppl will go for it. especially since they are in a for-profit company with a financial guy like Hill. that's not a personal knock against him; it's his job to go for it.
this thread isn't for sticking your head in the sand. we flush things out here.