I bet many of you know Newgrounds, and the website is in first line and will suffer directly from the loss of Flash, because games (and movies, and art, and music) have been made and imported there since 1999. And most of these games were made using Flash.
I don't recall Tom Fulp saying they would actively save these games from being unplayable in 2020, but he and many creators on this website sure feel deeply concerned about the upcoming death of Flash as well, and the loss that would mean for the gaming community.