Let me rephrase. I am proposing that (barring very specific requirements which webdev doesn&#x27;t justify) there&#x27;s no such thing as a &quot;good PHP developer&quot;. A good developer is a good developer, period.<p>A good developer will learn a new language in a reasonable amount of time and will be able to be productive and write good code in it.<p>A PHP-only (or X-only for that matter) developer is, by the definition above, not a good developer.<p>So why restrict oneself to some random pool of X-only people?