I replaced my 3D printer's stock hotend and unlocked printing speeds I didn't think were possible

Upgrading a 3D printer's stock hotend to a higher-flow model can unlock print speeds that firmware tuning alone cannot achieve. The stock hotend often becomes the throughput bottleneck, causing inconsistent walls, weak top surfaces, and under-extrusion at faster profiles. Replacing it addresses a real, measurable constraint rather than a cosmetic one, making faster printing practical rather than theoretical. The upgrade isn't necessary for casual PLA users printing at moderate speeds, but for those hitting visible extrusion limits, it can transform how the machine feels to use.