Fair, standardized probably isn’t the right term. Maybe common usage is a better term? I saw a video where someone was modifying a Dodge Viper and found that it used a Ford branded control switch or relay, not even the same company! Although that is a bit of an outlier.
Other parts were sourced from outside suppliers, which also supplied the same or similar parts to other automakers. Some of them were direct replacements, some were easily modified to work, and some could be robbed for components to refurbish your old part.
