Flash and Shockwave have not only shaped the web to what it is today, but also affected so many areas we couldn't even imagine before. Animations, gaming, broadcasting, advertising, music, arts, programming. The list is long.
Open sourcing Flash and Shockwave would be a decent thing to do. We don't want to see a big portion of internet history to just vanish. Internet represents the whole world and initiatives like Internet Archive are important, but powerless without having open formats.
There are so many projects going on to preserve Flash and Shockwave content, which would benefit from open sourcing. We know you can't open source everything. You can leave such parts off with a note what's missing. We also know some parts have already been open sourced, but there's too much missing.