Who "choose" OO 20 years ago and (much more importantly) why?
I'm going to ignore the social component... that said, we work in a wonderful profession where the world is changing completely every decade and many design decisions from the previous generation make no sense anymore. The business case for developing your application in COBOL rather than Common Lisp may have been sound 20 years ago, but today many of the reason why you didn't choose lisp are invalid (e.g., garbage collection takes milliseconds rather than seconds).
Note that this is not the case in more mature fields such as construction.
I'm going to ignore the social component... that said, we work in a wonderful profession where the world is changing completely every decade and many design decisions from the previous generation make no sense anymore. The business case for developing your application in COBOL rather than Common Lisp may have been sound 20 years ago, but today many of the reason why you didn't choose lisp are invalid (e.g., garbage collection takes milliseconds rather than seconds).
Note that this is not the case in more mature fields such as construction.