It’s standard practice to reduce safety margins when build quality increases. If you think in terms of expected lifespan, when the company has little control over how long things last and wants a minimum of say 1 year then some fail at 1 year and some fail after 20. As their process improves the minimum stays the same, but maximum lifespan decreases.
"Value Engineering" - make the same thing, but at half the cost, eventually you get chip bags filled with air and reduced by 1.5 oz margins until the profit matches what's needed.
It’s standard practice to reduce safety margins when build quality increases. If you think in terms of expected lifespan, when the company has little control over how long things last and wants a minimum of say 1 year then some fail at 1 year and some fail after 20. As their process improves the minimum stays the same, but maximum lifespan decreases.