Best method for dual filament - midwest.social

I’m thinking of building a new printer and would love to be able to make 2 color prints or dissolvable supports. Does anyone have any experience with this. I see 3 paths. 1. Two hot ends Pros: Most robust No retraction or filament waste Cons: Alignment issues. Reduced travel Dragging nozzle 2. Dual filament hot end(taichi style) Pros: Easy to mount No offsets Cons: Jamming? Long retraction 3. Y splitter Pros: easy to mount No offset Compatible with any hot end Cons jamming Super long retraction