Just as an update, Elegoo did finally release their multi material solution (canvas). I was ready to get my first printer a few months back but decided to wait for this and also to see what the reviews would be like for the Snapmaker U1 with its multiple heads that can do multi-material with much less waste.
All this stuff isn't so fresh in my head anymore and I need to look into all this again but just wanted to point out Elegoo did release the solution now.