The only time I met half competent full-stack devs was when the stack was limited to JavaScript on front and back ends along with API calls to serverless functi

The only time I met half competent full-stack devs was when the stack was limited to JavaScript on front and back ends along with API calls to serverless functions (eg Cognito) for "more complex" things. Never met one that could quit vim or design a database with anything other than varchars. That is not full-stack, that is knowing a syntax that happens to have ended at both ends of the stack.