It came to me as a surprise but that’s right: 2.6 is out. The changelog is available here. I installed the last development version (2.5.4) and to be honest, much of the changes I am looking forward aren’t there yet.
Still, Gimp core now uses GEGL “meaning that the internal processing is being done in 32bit floating point linear light RGBA.” That’s right: less destructive color transformation. The next steps are higher image bit depth and non destructive editing. But that is for a future version.
Thanks for your good job, team🙂