I assumed it was done for historic reasons so in the future websites like archive.org could continue playing flash. (like Shumway [0]) We would lose a huge libr

I assumed it was done for historic reasons so in the future websites like archive.org could continue playing flash. (like Shumway [0]) We would lose a huge library of videos that were created in the format if we could no longer play them due to browser policies and the obsolescence of the format. In terms of video encoding, there are much better options these days that don't involve transmuxing from flash when you're already encoding in h.264, so it likely isn't so sites can continue serving Flash. [0]: https://github.com/mozilla/shumway https://github.com/mozilla/shumway