Really? It's been nearly 20 years since Reprap, it's hard to imagine it maturing any more. If I get one I'll probably treat it like a belt sander or something, a tool that sits in the garage with plenty of fresh air. Agreed that it's a little concerning knowing some people that sit in a closed space with a dozen of these running (at that point you can smell the hot plastic...) but using common sense with good ventilation goes a long way.
I currently have a detached garage that wouldn’t be a good place for a printer. If I had an attached garage I could see it being a different situation.
As far as development goes, it seems like there has been a lot of advancement in just the past 5 years. Seeing what some of the high end commercial printers are capable of, I think there is still a lot of development left for what home printers can do. The Bambu printers are bound to get some competition. There are also a few competing technologies, and I’m willing to give it some more time to shake out. It still feels very much like a hobbyist tool for people who want to tinker a bit. I want to design and print without a lot of fuss.
I think I need to give it a few more years before it reaches a maturity level I would actually use.