

BambuLabs has one of the only somewhat working multicolor system
Welcome to 2025, Bambu has competition now
Anycubic Kobra combo (built in filament dryer too) Creality K2 Plus combo (2.5x the build area of biggest Bambu, faster)
Then there are DIY MMUS like ERCF, 3DChameleon, etc.
and the Anycubic Kobra combo, only one I know of with a heated filament dryer inside the MMU