Our entire profession has been moving more and more in the "bondage-and-discipline" direction over the past 10 years or so, tracking with broader sociological trends that are also justified with arguments involving "safety". That by itself can explain why Lisp has such low adoption. While Lisp has never been the most-popular language, it was never as unpopular as it is today. If that pendulum swings the other way, Lisp will get more popular again.