The future of Silverlight and Flash died when mobile phones rejected browser plugins. No amount of good choices from MS/Adobe would change that.
Yet, the other day I saw another Flash update pop up on Win 10 laptop in Edge. I don't even know why it's still needed.... What a strange ritual (now it's pushidng McAfee along).
Edit: FYI, quoting from the Wired, 2017:
Adobe itself acknowledged the transition [from Flash over to HTML5], though a bit less bluntly:
“As open standards like HTML5, WebGL and WebAssembly have matured over the past several years, most now provide many of the capabilities and functionalities that plugins pioneered and have become a viable alternative for content on the web.”