the saw example is unfortunate as that's a (desired) feature on expensive saws. But also user explicitly wants to, not some techbro decides to.

Typically saw safety features are mandated by a government. E.g. when I lived in the EU 30 years ago table saws had to have regen brakes so they stopped within a fraction of a second when turned off. Came to the US: no such thing exists. I'm not sure if that feature even exists on US sold saws today.