> > An OS UI is mostly buttons and other widgets, window frames, and behavior. The actual applications are very different.
> So is Bootstrap.
While that's true, it's a bit disingenuous given the difference between web development and native client development.
Not using Bootstrap doesn't mean that you need to write your own functionality from scratch; for elements like buttons all Bootstrap gives you is some nice CSS styles and a little bit of syntactic sugar over using the web browser's built-in implementation. There's a bit more of an argument for the JS plugins (tooltips, modals, etc), but even then the alternative is grabbing one of the countless other JS plugins that do the exact same thing, not necessarily rolling your own.
> So is Bootstrap.
While that's true, it's a bit disingenuous given the difference between web development and native client development.
Not using Bootstrap doesn't mean that you need to write your own functionality from scratch; for elements like buttons all Bootstrap gives you is some nice CSS styles and a little bit of syntactic sugar over using the web browser's built-in implementation. There's a bit more of an argument for the JS plugins (tooltips, modals, etc), but even then the alternative is grabbing one of the countless other JS plugins that do the exact same thing, not necessarily rolling your own.