All decisions are based on the facts you have to hand at the time. Its not hard to see that Michael's decision was based on comparing two different makes of bike one and which at that time had winning pedigree the other was new out of the box and still needed development , which in his mind had a better chance of a win. Michael is a winner and wants to stay that way that is way he made the choice to switch bikes. He is more fortunate than most that he is in a posistion to be able to make choices like this , what effect that will have on what rides he get offered in the future only time will tell, but then maybe not .