Seems that even assuming zero bugs and a tight peg with huge bid/ask walls and favorable risk/reward trade off as far as systemic risk to BTSX and bitX* assets, there will still be a longish road ahead for BitsharesX
Here's why:
One cannot rule out merchants accepting bit* assets for payment in the long run, but that can only happen if/when the network effects take over, i.e. BitSharesX would need coinbase/circle or equivalents onboard for easyish connections to fiat accounts, etc etc.
I would rather NOT assume network effects in the short and medium term, not least because Bitcoin already "owns" the mindshare.
Instead, having a stable version with a tight and liquid peg and decent yield, overtime might begin a virtuous cycle of non-BTSX fans holding some of their assets in bitUSD or bitSLV which will create more visibility which will create more usage, etc etc ...
This virtuous cycle should be enough to escape kisa0145's conundrum of "why hold bitUSD at <= 10% yield when BTSX has a much much higher yield while having the same systemic risk ?", i.e. credibility should beget credibility.