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.
LOL we got an ender at work too. That thing is so going to be dragged down the freeway one day. It’s gathering dust these days. Yup they keep on coming up with more interest stuff. Like the only reason I got into it was because they came up with water soluble resins. Like no way I’m keeping gallons of alcohol at home.