[Joel_Mckay]

Most filters have limited effective life for VOC, and "safe" use is measured in a few hours at most. Venting outdoors into a fern/decorative-plant filled yard is the preferred option for both FDM and Resin printers. Most activated charcoal filters just reduce the smell, and do nothing about the the harmful parts even with HEPA14 filters etc.

Chopped CF filled FDM filaments are mostly a scam, but there are few PETG and ASA viable options:

https://www.youtube.com/watch?v=w7JperqVfXI

https://www.youtube.com/watch?v=m7JAOi4JnBs

https://www.youtube.com/watch?v=vAL_p0yYKIc (Fibre Seeker 3)

One challenge designing a metal-printing process was making it safe for people without prior lab-safety training. Some 3D additive processes are simply just not practical for careless "yolo" consumers. =3

[dgroshev]

CF filled filaments aren't a scam, they just have different tradeoffs: more rigid, nice surface finish, and less warping (all useful qualities!), but also lower layer adhesion, lower tensile strength, and less toughness. It's not just anecdotal, Igor Gaspar collected a lot of hard data on that.