The concurrency stuff sounds nice. Apart from that I&#x27;m underwhelmed.<p>I can handle epoll based code without problems anyway.<p>The whole &quot;file handles&quot; can&#x27;t escape a certain scope sounds like what python&#x27;s with statement does.<p>The whole it&#x27;s amazing that you can &quot;encode business logic in types&quot; thing I <i>really</i> don&#x27;t get. That&#x27;s basically the selling point of object oriented code.<p>Similarly, SQL injection is a problem that largely plagues dumb PHP code and is close to irrelevant if you use a half-way decent ORM in any language.<p>&gt;The term &#x27;mostly functional code&#x27; is meaningless<p>Any code that is <i>mostly</i> made up of functional programming, but still has some state handling code. I think it&#x27;s pretty clear.<p>&gt;Actual software at the scale is quite complex.<p>Gee maybe that&#x27;s why I said it was complex.<p>&gt;That&#x27;s fine. But based on what I&#x27;ve seen (to be completely honest, not as an insult, you do not give the impression of someone who has spent extensive time with it[1]), I&#x27;d say you&#x27;re greatly underestimating exactly what it is capable of, as well as precisely what capabilities it offers in the first place.<p>No, I haven&#x27;t used it extensively. I&#x27;ve played with it.<p>I honestly think if it the benefits you tout were as great as you seem to think they are then there would be a far greater wealth of practical software written in it.<p>I know of one website (a local fashion retailer) and Facebook&#x27;s spam filter. That&#x27;s about it.