Does it really take that long to learn Angular? Will it really take long to upgrade to 2.0 and will you have to do it immediately? The web has always changed q

Does it really take that long to learn Angular? Will it really take long to upgrade to 2.0 and will you have to do it immediately? The web has always changed quickly because that is the only way it can survive. If you think you can write an app and let it sit there for years you're silly. Technology: there is no end game.