Hello @prokoudine
Have you got some information about the GEGL development?
From what I see on GITLAB it looks like its development is extremely low these past months [1]. On top of this the last update of Oyvind Kolas (the main developer of GEGL) on Patreon, his chosen platform to collect donations, dates back on July [2]. All of this is a bit worrying to say the least…
It is a pity no important software has adopted GEGL these past years. This would have allowed this software to get much more development; not mainly for GIMP ends I mean…
Anyway thanks a lot indeed for your work as a “GIMP ambassador” 
[1] Commits · master · GNOME / gegl · GitLab
[2] Øyvind Kolås is creating digital media tools | Patreon