Note that while the 1977 trio left their competitors in the dust, they were not the first prepackaged, preassembled personal computers on the market. But the makers of the Sphere, Compucolor II, Sol-20 and so on were terrible on the business side. While Apple was a VC backed startup and Tandy and Commodore were large companies as you pointed out. The rest became just footnotes in history which few people have ever heard of.