American Motors does not belong on this list. The continuing march toward fewer and fewer mega car companies meant that makes like Studebaker and AMC were not going to survive the process at some point. The article itself points out no one decision that hurt the company. Instead, the thing to consider is how long AMC survived with the meager resources at its disposal to develop, tool, and market new cars.
AMC started to rebound with the 1984 Jeep Cherokee and the 1986 YJ/Wrangler. The Grand Wagoneer, while niche, was a steady performer and was the forerunner of the 4-door Blazer (aka Tahoe) and Bronco (aka Expedition) lines.
The Eagle brand had hits and misses. The Talon (Mitsubishi Eclipse rebranded) was popular, the sedans not so much. The older AMC Concord and Eagle 4WD sedans and wagons were the predessors to crossover vehicles like the Subaru Outback and Volvo Cross Country amongst others. So in that regard AMC was really 15-20 years ahead of it’s time.