Re: "sluggish sales"
A sizable part of the population doesn't need now to have a general purpose personal computer, but it's happily using their smartphone. Few people, outside business necessities, are buying PCs.
People buying a desktop or tower computer for home are almost all enthusiasts and gamers, the one that in the 1980s bought a ZX Spectrum or a Commodore 64: we were relatively few compared to the general markets, and even if there computer were sold in millions, they were used by a niche.