Qt+Boost=invincible

Nowadays I was trying node.js (actually, following tutorials).
During the following, some thoughts popped up:

1. node.js says one of the biggest strength lies in asynchronous callback
2. Qt is designed to be asynchronous
3. Boost has boost::async

Now, the thoughts spread more……

1. Which of the two, node.js or C++, would have more libraries?
2. Which will be faster, JIT or static compilation?

My conclusion: why do I try node.js, though I can do it everything with Qt + Boost?