That’s kinda unfortunate.
Portals are an ugly hack all around. In my JS framework my plan is to avoid implementing them at all if I can help it. I’m pretty sure everything I would use portals for is now covered by the top layer APIs (dialog/popover). In typical web platform fashion they’re essentially unusable for anything serious without JS escape hatches, but I can work with that.
This just reminded me to check how Anchor Positioning is doing, and apparently it’s set to drop in FF in 2 days! Then we will be free 
