Can EventDrivenLoader (EDL) or AsyncLoadingThread (ALT) be enabled in Editor (PIE)?

Packages loading in PIE only uses Game Thread and get blocked when uassets get serialized (I/O). When level is too large or there are too many packages to streaming in, that’s pain. However EDL and ALT are only enabled in shipping build with cooked content. Why? Any idea to enable EDL or ALT in Editor to boost the assets loading?