I've been printing and using ABS parts for years. A little post processing goes a long way, usually a spraying of acetone to smooth and double check all the layers bond well. As long as the parts are designed for printing, they work great.
I did a complete seat pan and headlight assembly for a cafe bike last year. Never had an issue.
https://www.thingiverse.com/thing:2467933
https://www.thingiverse.com/thing:2467959
Working on some adapter manifold for an induction project right now and considering printing in carbon/nylon with some threaded inserts instead of cnc cutting from aluminum. Worth a try.
I also printed a wing core for my track car that has a carbon spar, and will be laminated in carbon this spring. Should work great. Did some VR work with it for fun.
I'm watching for when I print metal at home, hopefully in the next few years.