I have to say that in 1981, making those decisions, I felt like I was providing enough freedom for 10 years. That is, a move from 64 K to 640 K felt like something that would last a great deal of time. Well, it didn't - it took about only 6 years before people started to see that as a real problem.

Speech on the history of the microcomputer industry (1989)

Bill Gates Talk on Microsoft (1989)[csclub.uwaterloo.ca]