Hi,
To me the major issue about UE4 Editors is the memory, my has 16GB, when i open my project the editor shows “Mem: 1.038 mb”, 15 min later after a few changes (like copy/pastes) it reaches ~“12.000 mb” and starts frozzen. So i need to restart editor everytime it is near 12.000mb, it is so annoying. I think it is maybe because the number of objects you store in memory so the user can make “undos” e “redos”