> Ford killed the Focus and Fusion because they simply couldn't be sold for a profit since most people didn't get the high end models

They stopped providing it as a model to the American market. It's based off a Ford platform, though, and other automakers are continuing to use that platform. The Focus also continues to be a model in European markets.

During the beginning of the pandemic there were also parts shortages. Many manufacturers stopped making their lower end vehicles and only produced the higher end ones with the limited parts they could get, because, they can convert those parts into higher profits.

I think these decisions are best viewed as the awful intersection of short term wall street thinking combined with latent and intentionally imperfect measures of consumer demand.