With resin printing, you can definitely get a nice clean fan blade easily.

Which is why they don't mind releasing the models.

Its a large chunk of what this channel does. Most of the time the prince are either louder or less performant. But there have been a few that came close to the noctua.

There's a whole series on youtube (fan showdown) where different 3D printed designs are tested against one another. Seventh season currently.

I think it's possible in theory but getting the setup needed to print with the proper materials and fidelity would be expensive enough to not be feasible unless you were doing it in bulk.

I'm curious to hear from some experienced 3D printing nerds around here too - balancing a simple 120V, low rpm fan is hard enough.

But maybe home/hobby printing today has achieved the needed level of accuracy.