You'll be stuck with using a shim for old browsers for quite a while to come, especially when it comes to mobile. The good thing is, at some point in the futur

You'll be stuck with using a shim for old browsers for quite a while to come, especially when it comes to mobile. The good thing is, at some point in the future you can just drop the shim and everything keeps working. Lodash does has a lot of additional nice utility functions though.