For me new has to be new. I learnt Tcl/Tk back in the 90s because I could rapidly develop a GUI on X11 but then started to use Tcl as a general purpose scripting language. Then I look at Ruby and Lua and Node.js and I think, what can any of these do that Tcl doesn't, just as well and usually better? E.g. all the async stuff in Node is old news in the Tcl world. Then I look at people who flock to the latest thing always and I think do I want to work in a world where every project it someone's first in an immature technology, or maintenance in a dead-end technology? That doesn't sound very satisfying to me, I want to get the foundations right and build on top of them, not build on shifting sands.