Yep and if you know the fundamentals then you can pick up a new framework in a couple of weeks because these frameworks being discussed are built around core CS concepts and patterns borrowed (rightly) from elsewhere.
I was recently at a jobs fair and spoke to a lot of companies and everyone (apart from one) were saying they wanted developers who had the core fundamentals and could learn any framework or language (the latter obviously takes longer but not much longer). So they weren't putting an emphasis on having to know the latest frameworks even if they were using them, but instead looking for people with knowledge of core concepts.
I was recently at a jobs fair and spoke to a lot of companies and everyone (apart from one) were saying they wanted developers who had the core fundamentals and could learn any framework or language (the latter obviously takes longer but not much longer). So they weren't putting an emphasis on having to know the latest frameworks even if they were using them, but instead looking for people with knowledge of core concepts.