I would not be. React Router 4 is awesome. Wish I had time to write down why. But if you have reason not to upgrade, you can stay on version 3, which is still s

I would not be. React Router 4 is awesome. Wish I had time to write down why. But if you have reason not to upgrade, you can stay on version 3, which is still supported. Same with Angular. Of course there will be examples you're right, but not those two. ;-)