As an industry develops, products branch out to cover many niches. Look at vehicles. After a century of development, we have cars, wagons, SUVs, crossovers, sports cars, hybrids, trucks, etc. With product differentiation, manufacturers can sell to a greater number of people.

I bet that the day you bought your computer, it was a lightning fast machine – slicker than reindeer slobber. After the honeymoon was over and the new computer smell wore off, most likely your boot up times increased, your shut down times increased, and the computer seems bloaty.