

HTML / JS is still a buggy pile of slop.
In what world is JavaScript considered buggier than Flash, either in the actual content in the wild or the client-side software rendering/running that content? It wasn’t true when Flash died and certainly isn’t true today.
Flash was a security nightmare, with all sorts of kludges patched on to try to deal with fundamental flaws in how it handled privileges. If you want to go back to the days where zero click exploits can take over your machine just from a browser visiting the wrong URL, leave the rest of us out of that vision.
The current web experience is complete garbage in comparison.
Mm, and what makes you think that handing Adobe the keys to control everyone’s web experience would make it better?









There just wasn’t really user-submitted content back then. If you wanted to post something on the internet, you had to create a website.
There were tools that made a website a bit easier to create (most notably Geocities), but it was still a fairly technical task to simply get text that you typed show up on a website accessible to all.
Simply being able to reply to someone else? That wasn’t really on the web, although by 2001 there were a few attempts to bring that kind of forum functionality to the broader web on actual http/www webpages (when it was previously on Usenet and BBSes and mailing lists and the technologies known as the internet before and separate from the world wide web). vBulletin was the popular one, and I think phpBB was fairly popular, too, but those projects started in 2000 and weren’t that popular in the first years. Web hosts actually offering a full blown LAMP stack (Linux, Apache, MySQL, PHP) for hosting, and the technical skills to administer that kind of service, even on free software, was a pretty big hurdle to adoption before 2003 or so.
In 2001, almost all of the web was static content, with no method of interacting with the content other than simply viewing it. You’d click on links to retrieve another piece of content. By 2005 the web 2.0 revolution was underway, and websites had become interactive, with dynamic content drawing from relational databases under the hood. But in 2001? No, the web was pretty static.
Your description of the rise of the social algorithms is part of the story since 2010, but even that leaves out the period of time in between.