Well, true, but we all must prioritize. Working time is limited. "Be proficient in both" is not necessarily practical for everyone. It may not be for the OP. A

Well, true, but we all must prioritize. Working time is limited. "Be proficient in both" is not necessarily practical for everyone. It may not be for the OP. Also, it's conceivable that if you split your time amongst different frameworks, you could be at a competitive disadvantage against someone who's more specialized. (Of course, the complete opposite is also conceivable, so don't take this as me advising people to study just one framework.)