I guess I was not clear enough - I think even the hotend alone is propriatary - but as I said, I may be proven wrong.
The 40 mm/s speed is in my eyes not related to the hotend. Btw., the official statement for Snapmaker 2 is 60 mm/s print and 80 mm/s travel speeds: https://support.snapmaker.com/hc/en-us/articles/360044341034-What-is-the-recommended-3D-printing-settings-in-Cura-or-Simplify3D-for-Snapmaker-2-0- (need to scroll down a bit)
If you are in the Facebook group, look for the posts by Josef Walter Hausknecht - he went up to 120 mm/s with modified linear modules.
On my “old” printer I had a crappy hotend until recently, and still have the original bowden tube feeder which I’d estimate to be on par at best with the Snapmaker feeder, and with that and a 0.4 mm nozzle I was able to do even 150 m/s on a CoreXY system, so I yet have to find the hotend the limiting factor. My guess is that if you run a large nozzle plus large layer height plus high printspeed you’ll at some point need vulcano or supervulcano or something similar.