Software in 80s/90s requires much more design than it in today. Sometimes people even develop theories and systematize knowledge before developing. Softwares t

Software in 80s/90s requires much more design than it in today. Sometimes people even develop theories and systematize knowledge before developing. Softwares today prefer to use "agile development" which usually be understood and used as "think less and start coding". In 80s/90s, customers of software were targeted more on big business customers who can pay a lot more. Today, more and more small customers even free users are targeted, so software companies focus on a more unstable user group than it in the past.