There is a single developer who writes changes to UE4 for Linux support. And he doesn't work in Epic. UnrealED doesn't work on Linux, AFAIK only HTML5 build pip

There is a single developer who writes changes to UE4 for Linux support. And he doesn't work in Epic. UnrealED doesn't work on Linux, AFAIK only HTML5 build pipeline could be run on Linux, so you could make changes to code, but you can't test them if you're using "officially supported" platform.