The problem with this plan is that Flash contains a lot of security bugs - 316 vulnerabilities were reported only in 2015. Fixing them to get a secure version will require a huge amount of work, to the extent that The smartest brain at Adobe can't solve it either.
There are many great projects built on Flash and worthy of being saved for the next generation, for Internet history researchers, experts or design lovers, including the originals of many auto games. -runner has been extremely popular like Canabalt or test sites like Dont Click.
If you have the same opinion with Lindstedt, you can sign your petition by typing the source code repository on GitHub at this address.https://github.com/pakastin/open-source-flash