This seems really interesting...

https://www.aliexpress.com/item/S-Ride-RD-M500-Mountian-Bike-11-12-Speed-Long-Cage-Rear-Derailleur-Compatible-With-SHIMANO/32831539298.html

https://www.aliexpress.com/item/S-Ride-Mountain-Bike-12-Speed-Trigger-Shifters-Compatible-SHIMANO-MTB-Cycling-Bicycle-Derailleur-Shifter-Transmission/32827337029.html

https://www.aliexpress.com/item/S-Ride-12-Speed-Mountain-Bike-Cassette-Freewheel-46T-50T-Gear-Compatible-Shimano-SRAM-12S-Cycling/32828949828.html

Compatible with Shimano? From what I know, Shimano did not release a 12 speeds drivetrain yet.

I imagine compatible with shimano cranks and hubs? ie. not the XD cassette driver body

Definitely interesting. But I love my Shimano XT's.