Javascript will probably be around for a while but Python and Ruby have been constantly shrinking in mind share and buzz these past years (mostly because of Go but also because there are now faster, statically typed languages that subsume them).
The simple truth is that statically typed languages have been much better at improving in areas where dynamically typed languages used to be the only ones shining than the other way around.
In a few years, we'll look back at dynamically typed languages with the same fondness as we do Pascal: it was a good idea at the time but we do better now.
> Javascript will probably be around for a while but Python and Ruby have been constantly shrinking in mind share and buzz these past years
At least in the scientific and data analysis communities, Python is exploding. I'd say it's neck and neck with R. R's infrastructure outside data analysis is weak but improving. Go isn't even a part of the conversation.
Can't speak to Ruby, but as the "big data" hype cycle continues Python will continue to blow up.
The simple truth is that statically typed languages have been much better at improving in areas where dynamically typed languages used to be the only ones shining than the other way around.
In a few years, we'll look back at dynamically typed languages with the same fondness as we do Pascal: it was a good idea at the time but we do better now.