I couldn't agree more with this. However, I'm curious: at what point do you think the flavour-of-the-month JS frameworks actually do make sense for a developme

I couldn't agree more with this. However, I'm curious: at what point do you think the flavour-of-the-month JS frameworks actually do make sense for a development team / company? This might just be me being old and set in my webdev ways - I remember when PHP4 arrived on the scene, for goodness' sake - but I do struggle to see the business case for a lot of the current JS-everywhere, a-million-tools-for-everything environment, and I suspect I'm missing something key.