...Backwards compatibility with old project files.
I hadn't fired up Spine in a year or so. Opened it up, upgraded, and then had a lurch in my stomach. Will my old files open and be correct?
Yep, they were fine.
In general, I just wanted to say thanks to Esoteric for making such good software and maintaining it well. I'm a software engineer and have some idea of the effort and organization needed to do that.
Long live Spine!
-Erik