No that’s not it, in prior engine versions when I disable AllowStaticLighting, it didn’t take any longer time for me to load the engine, it started right away regardless. The longest I ever waited was two minutes, certainly not the 15+ minutes that I have waited now.
EDIT: I’m not sure the shaders are the fault, because in the task manager it doesn’t show any shader compiling task at all. It only shows 3x UnrealGame task + 1 Unreal Editor task.
And the hardrive runs at 100% all the time.
Also, without disabling AllowStaticLighting, the editor just takes me only 4 seconds to load up.