system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5:What is it that makes Toyotas so reliable even after many years of use?

Large amounts of spare parts made? Manufacturing process? Design differences?
gpt
Toyota revolutionized a manufacturing process about 40 years ago that allowed bottom up refinements to address manufacturing issues (the assembly guys on the line can spot an issue and report it up the hierarchy to get it changed, rather than waiting for the managers and engineers to discover issue) and had an extreme focus on quality. At this point, other car makers have caught up in many respects and it’s more reputation than anything at this point. And the worst brands today are still better than the best a generation ago in terms of reliability.