Adobe announced in July 2017 that Flash would be discontinued, and it reached end of life on 31 December 2020. Browsers had been disabling it for years by then, so the actual death was slow and well signposted.
That did not make it less final. Flash was not just a video player β for about fifteen years it was the only practical way to put something interactive on a web page, and an entire creative era was built inside it.
What Flash was actually for
Before Flash, a web page was documents and images. Flash gave one person, on one computer, the ability to make something that moved, responded, had sound, and ran the same way for everyone who visited. There was no equivalent, and the barrier to entry was a piece of software and some patience.
What came out of that was a genuinely strange body of work: animated series, absurdist shorts, thousands of small games, interactive music toys, and an enormous quantity of things that do not fit a category.

The specific things that went
The games. Tens of thousands of small browser games, mostly free, mostly made by individuals or tiny teams. This was where a generation of developers learned, and where the design conventions of casual gaming were worked out.
The animation. Flash made animation cheap enough for one person to produce a series. Sites like Newgrounds hosted vast catalogues of it, and much of the sensibility of internet humour for two decades came out of that scene.
The interactive oddities. The unclassifiable things β music toys, generative pieces, elaborate jokes with a button. Closest in spirit to satisfying websites that do nothing useful, and far weirder.
What got rescued
Quite a lot, actually, and almost entirely by volunteers.
Flashpoint Archive is a preservation project that collects Flash and other web games and ships them with the runtime needed to play them. It holds tens of thousands of games and animations, and it works β you can play things today that have had no working web home for years.
Ruffle is an open-source Flash Player emulator, written in Rust, that runs in a modern browser. Sites can drop it in and their old content works again without anyone installing a plugin. It does not handle everything, but it handles a great deal.
Between them, the files are in far better shape than anyone expected in 2017.

What was not saved, and cannot be
The files are the easy part. What is gone is the context: the front pages, the comment sections, the voting, the daily rhythm of a site where new things appeared and people argued about them. A preserved game you launch from a local archive is not the same object as the same game found on a portal at fifteen, surrounded by other people finding it.
This is the recurring pattern in web preservation. Content survives when someone copies it; culture does not survive at all, because there is nothing to copy. It is the same loss described in lost media.
The transferable lesson
Flash died because it was a proprietary runtime controlled by one company, and everything built on it inherited that dependency. Anything you make today that lives inside a platform has the same shape of risk, with a less obvious expiry date.
Open formats at stable addresses are the only version of this that has ever survived long-term. That is not a moral point, it is just an observation about which things are still readable.