But it's not fast for the people who follow. That's the problem. If you create a product then there is an external cost borne by the users who need to use it.

But it's not fast for the people who follow. That's the problem. If you create a product then there is an external cost borne by the users who need to use it. And then if you replace that product with some other product, those users need to retrain. It's really easy to create a new product, but it is a commitment for someone else to adopt it. And just because the cost is externalised, doesn't mean it doesn't exist.