Risky for people who are moving coins around (obviously bad for Bitcoin)
but not risky if you are holding coins and have them on both chains, right?
Basically yes, if you have some coin in the chain-A and some in the chain-B... when the chain-A will be abbandoned (by the miners and all the other people) you will lose all your coin in that chain. Now let's make an example, if somenoe will buy coin froim the chain-A with dollars and that chain will disappear what will the buyer think?
you do not understand, there is no need for consensus on a mandatory update, gavin knows it, everyone knows it, just release it and stop this no-sense fud
If the majority of people will not use the new 'client' = reach the consensus, then it will be a problem to everyone because two chain cannot exist forever.