JuliaPro and Julia Simultaneous Installations: Sensible? Conflicts?

I haven’t used JuliaPro in a while. When I did, I ran into a lot of problems with version conflicts.
In particular, I remember wanting to use the latest Optim.jl, which had just undergone an API change – but I was stuck on an old version.
I head this got better as we moved further from Julia 0.5 (ie, almost all the packages have caught up to 0.6 now). I didn’t know until this thread that they’ve actually pinned the packages.

A little off topic, but:

Couldn’t JuliaPro solve some of these issues? That is, JuliaProStatistics, JuliaProEcon, JuliaProPhysics…
Packages tailored towards fields, so that they can be relatively lightweight, and cover basics that people in different fields need? People teaching classes can easily direct their students to JuliaPro[field].