Desktop computers are becoming increasingly uncommon. I'm a pretty technologically inclined person and I havent owned a desktop in years. For most people, laptops have been more than capable enough for their needs for a long time. And for general purpose computing, smartphones are pretty heavily used too.
Yes, people do think that. And then they end up with an octopus of fragile external drives prone to problems and breakage. It's a sad state of affairs for the non-tech inclined. Like everyone is buying mopeds and pulling around trailers rather than just buying a small car.
