30 years ago (1993): Linux existed, Python existed, web existed (mosaic), DOOM (3D graphics), and even Apple Newton (mobile) existed; and C, shell, windows (GUI), spreadsheet, sql, etc were known long before that.
What exactly revolutionary happened in the last 30 years? javascript? (two weeks project)
amazon, google, facebook, netflix, iphone, instagram, tiktok -- execution is great but seems inevitable that somebody will create it. Ok, for non-IT people iphone was a game changer (the first personal computer that your grandmother can actually use).
The ability of generative AI to produce BS indistinguishable from human BS is very impressive but it remains to be seen whether it is a net positive for an average developer (the time wasted correcting it, waiting for its output can be spent understanding the problem better--the typing the code itself is a small part of a programmer who knows what they are doing).