What the heck?

Before making a claim like this you better define what you mean by "succeed" and what you mean by "normal timeframe".

Julia has been around since 2010-ish. The equivalent timeframe for python was late-90s.

The federal reserve bank uses (used?) Julia to model economics... Jokes about whether that is a succeed or fail for society at large, aside, it's hard to argue that adoption by at least one very significant player doesn't constitute success for a PL.