Yann, I get what you’re saying, but I can’t disagree more. Yes, the first mover advantage can be exactly that - an advantage - but if you work hard and smart, you can certainly be better than the competition even if you’re late to the game.
And I agree with what Anne Thomas said — being on every platform is nearly impossible. Yes, you can experiment with new tools and platforms for a bit, but you should hunker down on the ones with most impact.