This is true for backend frameworks too. In the PHP world, Laravel contains many helper functions that uselessly duplicate functionality already available in th

This is true for backend frameworks too. In the PHP world, Laravel contains many helper functions that uselessly duplicate functionality already available in the standard library. Not only is this a waste of effort from the framework's author, it also unhelpfully silos some developers into Laravel-specific knowledge. I had a colleague who had worked professionally as a Laravel developer for several years but then failed a job interview because he'd literally never written a vanilla PHP script and had no idea how to go about it.