It really depends on if you have family/kids. That sort of move will require a lot more thought and planning if you are to move your whole family. Compared to

It really depends on if you have family/kids. That sort of move will require a lot more thought and planning if you are to move your whole family. Compared to if you are single, you only have yourself to look after and provide for. I have just immigrated to England from New Zealand with my wife without the certainty of work. Luckily we have a family friend who is housing us while we look. I would say that the chance to move over to SF with the certainty of work is something that might not come up very often. If you did decided to go I would definitely try to arrange to keep your company in France going.