Defects in 3D print jobs are usually usually related to model design, slicing parameter decisions, and occasionally a printer part needs replacement/servicing (

Defects in 3D print jobs are usually usually related to model design, slicing parameter decisions, and occasionally a printer part needs replacement/servicing (like belts). So far, firmware crashing hasn't been an issue. I'm supporting open source firmwares though (Marlin, Klipper, and soon RepRap/Duet) so they're VERY battle-tested. Maybe this is an issue for proprietary closed-source firmware?