It would be good if we can get as many people as possible to chime in on the thread here:
I met the Kaggle CEO - Anthony Goldbloom - last year and he reiterated what the Kaggle staff said in that thread. They did not see sufficient Julia usage when they had support. After their acquisition by Google, they had to redo a lot of their infrastructure and ended up dropping Julia. When the time is right, and there is significant community demand, he said they would certainly revisit it.
A lot has changed in the last 2 years and the Julia community is at least 4-5x larger now.
From what I know, there are quite a few folks there who champion Julia. So it would greatly help for folks here to chime in there. Ideally with a somewhat detailed comment on why you would like to see Julia on Kaggle. Certainly upvote the topic and other comments you agree with at the very least.
-viral