Name one bontech nozzle, hotend, or extruder you cannot buy a clone of. Also it's not even released.
There's not a 3D printer manufacturer who does what you're asking, which is to hand over years and 100s of thousands of dollars of research and development over to other manufacturers to duplicate. Because you're not making these nozzles at home, you're not building an induction heater at home. Go ahead and try and claim Prusa still does. Even Prusa's latest overpriced beta release printer, that is based on 10 year old tech, still isn't 100% open source.