[PaulHoule]

In theory. In practice people are very happy with what happens when you

  import pandas

in Python, more so than competitors. I have been hoping though that with the planned Java transition to FFI, you can make Jython pass Python FFI through Java API to get numpy and all that working.

[pjmlp]

More a side effect from teaching materials than anything else, though.

Java still has the issue of the time Valhala is taking.