Have patience, someone will build a printer with a conveyor belt bed (Creality CR30 hyper clone) that can keep up with the BL.
Creality has a new "Flagship: printer coming out soon claiming 12x faster than standard Cartesian printers, so maybe they hacked the BL OS or came out with a new solution to increase speed and keep quality.
They would be the ones to make a production model in that manner. 5kg spool holder, use 1.75 or 2.85 filament…lots of things they could do.
BL making a third model that has dual print heads or dual nozzle, that would cut the multi-color printing time by 80% and reduce the wasted filament I hope is the next iteration. Even an CMYK print head and mix colors.