Anyone who used Modula-3...<p><a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Modula-3" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Modula-3</a><p>...knows that one can have key features of C++ for systems programming with an easy-to-parse, safer, and [for a time] more efficient language. The SPIN OS team even modified it with type-safe linking so one could hotload code into the OS. What I saw there was &quot;hotload code into running system&quot; w&#x2F; associated benefits during updates. Or safer, better JIT. ;)<p>Anyway, combined with LISP-style macros &amp; irritating parts removed (eg uppercase, verbosity), you get a system language that blows C++ away in productivity (esp w&#x2F; DSL&#x27;s), compiler efficiency, maintenance, and possibly run-time efficiency. The world might have went in a different direction but they better be honest about parsing pain they created. And all the productivity opportunities lost due to that.