That is interesting. I haven’t upgraded my hotend yet, and these ones do have some interesting features. I’m not sure what you mean by “FFF should stay behind”.
If I understand, what you mean to say is FFF needs to keep advancing, keep developing, keep innovating. I totally agree. I think the next big leap is curvilinear printing, where the nozzle moves up & down to follow vertical curves of the model.
This is exactly what i mean! Curvilinear is tend to turn 3d printing from 2,5D to fully 3D with XY and Z axis moving simultaneously. After this, should involve other two axis A and B or C to deposit filament in five axis. Quite easy to do but i really don’t know if someone will provide it as a cheap kit and which brand will create a specific slicer …
One relatively inexpensive advancement just happened. It’s a printer that has a converyor belt for its print bed. It comes from Creality: http://creality.com
I think the difference in price would have me (cheapskate that I am by necessity) look at the cheaper one first and then go see what the expensive one has to offer. I know this idea came from an American that was interviewed by Joel of 3d Printing Nerd two times if I remember properly.