I vote for Inkscape branch, also Scribus and Krita, but not separate forum.
I think FOSS have many advantages: unified python scripting language, GMIC as unified filter library, even unified look , which every program inherits from GTK or Qt; it also ability to use Linux as safe primary OS with no worries to keep crypto wallet on it or just avoid any junk or malware; ability to improve software according to needs(I have open ticket on Freeplane and as result I get feature I need in next release, I was quite impressed by it).
There is many forums for any separate grafics software, but not for open source bundle(maybe I`m wrong). I think discuss.pixls is good place to connect them. I wish it would be any cross software showcases of any production or non production workflow, in which every piece of software have participated.
Let`s share and enjoy by Free CG Ecosystem!