I was thinking about this question today as someone used our work printer for some personal stuff.
As for me, I am printing little things that I would say make it worth it. I’ve printed lens adapters for my camera for example. That’s worth a good 14 to 30 bucks per print. My most favorite photo was with an adapted lens that came from a projector. I also printed IEMs and those things are worth it. Listening to music is second to none on those things. Plus I printed the same shell but for ear protection and again the fit is perfect and sure there’s post processing to get smooth surfaces but in the end it looks like a professional made it. So I think 3d printers are worth it.
I say to people : if you’re interested in 3D printing, you need two hobbies. 3D printing and anything else. The second hobby can be repairing things, a sport (spearfishing for me), board games, electronics, etc.
I started with a 100€ very small 3D printer for years (Tina2) and that was so worth it. Now I have a Bambulab with AMS and it’s night and day.
We got the bamboo labs at work, that thing is fast.