Because you can write a new JS/HTML framework in a few days. Compare this to e.g. Qt or GTK or WinForms or WPF. Each of those would require man years of effor

Because you can write a new JS/HTML framework in a few days. Compare this to e.g. Qt or GTK or WinForms or WPF. Each of those would require man years of effort to reproduce from scratch. Also these JS frameworks tend to be opinionated with how databinding works etc, such that there's always something that you have to work around when you're using the framework in real-world projects. People get annoyed enough that hey it's easier just to create another framework.