Just giving an update on the sprint.
We have several coupled projects ongoing in my fork (https://bitbucket.org/caseywstark/yt-3.0
). First, there's the 3.0 field renaming (see https://ytep.readthedocs.org/en/latest/YTEPs/YTEP-0003.html
). This touches universal_fields, frontends, and any reference to field names in analysis modules. Then there's the unit work which is probably most of the work. Nathan and I are finishing off the implementation and adding many tests. Finally, I'm writing a YTEP for simplifying native vs. derived fields, something that was really enabled by the units work. I will start another thread once that's review-ready.