Long read The rise and fall of Adobe Flash Before Flash Player sunsets this December, we talk its legacy with those who built it July 7, 2020 https://arstechnica.com/information-technology/2020/07/the-rise-and-fall-of-adobe-flash/
LOL, this article is way too long. But I remember that Flash in the beginning days was pretty cool, I mostly used it to play games. But then it became a huge security risk and it was't always stable, plus it was a pain to update sometimes.