@Gargron "10x better" sounds like BS, to me, because you can't actually quantify relative quality like that in any sort of measurable way.
Taking the question as "enough of an improvement for people to switch", it depends a lot on two things. a) the use case of the person who might be switching, and b) how steep of a learning curve they're willing to go through to give another service a chance. (1/2)