Carbon-fiber surface treatment is the real functional upgrade here—skip the hype cycle. The "epidermis" approach actually addresses where prints fail most (surface layer fatigue) rather than just throwing reinforcement throughout the model, which wastes material and print time. SindriCAD matters because open-source parametric CAD finally gives Linux users something that doesn't suck, breaking Fusion 360's stranglehold for hobbyists who've been stuck with clunky alternatives. The multicolor no-AMS hack is clickbait theater—sure, you saved money, but you lost 80% of your weekend to manual filament swaps; Bambu's AMS is $200 cheaper than your time. LightMake's four-head system is vaporware until someone actually ships reliability at scale—parallel printing sounds great until you're debugging four simultaneous nozzle jams.