I have no doubt that a band saw can be made with 3d printed parts - all it would take is the right amount of testing and trial and error to determine how strong the parts need to be.
Of course it couldn't entirely made from 3d printed parts, but then a wooden band saw isn't 100% wood either. You would add metal where you need more concentrated strength, like screws, shafts, bolts and bearings. But I firmly believe everything else could be printed while you kick back munching Cheetos and watching YouTube, while not potentially cutting your fingers off on the table saw you don't know how to use safely.
And like I said in the video, you don't have to throw away a full day plus expensive paint to finish the parts. So I think that printing the parts (or even paying to have them printed from a stronger plastic) would be fairly economical.
For example, the table I printed used less than a full spool of filament, or roughly $25. The plywood I used to make the original costs MORE than that today! If you can get it, that is. And then you need to machine it and finish it and hope you don't make any mistakes.
So yeah, this may seem like a novelty project, but it is definitely not that.
Remember, guys were saying you CAN'T build a wooden band saw not that long ago. Never say never - you are betting against human ingenuity.

Watch the original build video I made for the band saw here:
   • Making a Band Saw - Full Build Video  

▶️ Project plans for sale: https://ibuildit.ca/plans/
▶️Support the work I do on Locals:
https://ibuildit.locals.com/
▶️ Patreon:
https://www.patreon.com/user?u=865843...
▶️ Join my Makers Mob for detailed build tutorials:
https://go.themakersmob.com/john-heis...

My "Scrap bin" channel:
   / ibuilditscrapbin  

#ibuildit
#woodworking

Website: https://ibuildit.ca/
Facebook:   / i-build-it-258048014240900  
Instagram:   / i_build_it.ca