I fully expect plenty of people to do some of the data-crunching in Python, Julia, R, and so on, and bring it into Observable to explore and experiment. And I also expect JavaScript's ecosystem to blossom, especially with WebAssembly & WebGL hitting the mainstream.
I’d expect more python users to bring d3 in that bring python to JavaScript.
And then it occurred to me that CRAN and NPM have a fair bit in common. Both have a package for anything you might imagine, and both have a mix of amazing and less-than-amazing quality.
So USA-centric. My second biggest university in Ukraine (50k students) doesn't have any .edu domains and certainly didn't supply them to the students. Same as first biggest university and just about every other in the country, they all use regional or other general domains.