I recently decided to port some of my Python analysis code over to Julia since I've been doing a lot of ODE stuff lately. Overall I'm liking it, but I've found a couple things frustrating: 1) the docs and online issues/answers are a bit of a mess, partly because many of the accepted answers are from pre-1.0 days; 2) the error messages I've found are long and not very helpful. It takes much longer to track down a bug in Julia than Python code.