Why that 40% performance hit for full 'ZombieLoad' mitigations probably won't affect you

Tuesday's revelation of the existence of the "ZombieLoad" vulnerability and the subsequent patching of the issue in macOS has led some users to be angry about the potential 40% reduction in system performance for their Mac. While significant, that impact will really only impact a small percentage of Mac owners, while the vast majority of complainants are upset at something they just don't need to endure.