I'm really curious what a new language would need to have to start stealing users from Python in the data domain. I was also a bit surprised that Julia didn't get more traction, as I felt it was a more enjoyable experience, but obviously it doesn't have the extensive community and ecosystem that Python has so it was fighting an uphill battle from the start. Interop with Python (like R's reticulate) would be helpful when targeting Python users, so they could still draw in their favourite packages, but Julia has that already.

In my new/current role, I primarily use Python but would prefer not to; however, it's a tough case to make against Python when it's become the default data language (along with SQL).