Reason #4: Another problem is that the network kernel was never designed to do internet on the mass scale desired today. Companies like whatsapp devoted lots of time to getting e.g. 2M concurrent TCP connections (considered good) running on a single box, mainly because of the greedy overhead and design of the legacy network kernel. Whereas, in theory it should be possible to have 10M or more concurrent TCP connections on modern average hardware. So from this POV then the legacy network kernel is the bloated memory greedy mess that Java is to software development. See <a href="http:&#x2F;&#x2F;c10m.robertgraham.com&#x2F;p&#x2F;manifesto.html" rel="nofollow">http:&#x2F;&#x2F;c10m.robertgraham.com&#x2F;p&#x2F;manifesto.html</a>