I recently reviewed the performance of one of our clients’ websites. During its lifespan, a myriad of developers had contributed their code without any form version control.
Don’t get me wrong: frameworks are great and they can make your life easier if they are considered well. Let’s say you’re building a web application and are planning to use all kinds of enhancements to make user input easier, i.e. date pickers, spinners, range sliders and so on, then sure, it might be worth considering a framework that can provide this kind of functionality for you.