Almost nobody actually used Swift prior to mid-2014. Did any 1978 C compilers offer both K&amp;R and prior as options?<p>IMO the example of Java is a great illustration of why Swift shouldn&#x27;t be tied to source compatibility too soon. You don&#x27;t want to be stuck supporting your 1.0 syntax until the end of time, or you&#x27;ll end up like Java!