These examples were picked in the early 1990s, and are specific to the US market. Things change.
For example the US car market has long been largely dominated by GM and Ford with Toyota only recently breaking that (and VW is non-existent). GM and Ford are still the two largest manufacturers: https://knoema.com/infographics/floslle/top-vehicle-manufact...
The point is that there is usually very few dominating brands in a market, with the top 2 (approximately) yielding the power and the others following and filling the gaps.