Yes, I would have loved to use a 'better' material, but my printer is not enclosed and I'm not sure it can print CF filaments (I think I would need to change the hot end at least). But soon I will hopefully get my hands on a new BambuLab printer which should let me play with those materials!
Actually you can. You'd need a hardened steel nozzle and that's about it. CF/GF filaments are designed to be easier to print, even on an open printer. It's almost the main reason they're popular.
