That doesn't make sense to me. Where do you draw the line between a framework and a product? Google et all probably have lots of internal tooling and framework

That doesn't make sense to me. Where do you draw the line between a framework and a product? Google et all probably have lots of internal tooling and frameworks. Hell, react started as internal to FB didn't it? Does that count as a framework or as a product? Lots of other companies have similar internal frameworks, probably with less resources devoted to them, but in the other hand with less use cases. Do those not similarly count as frameworks written by experts?