Malvineous:
I miss Flash. Watching Strong Bad every week, playing games on the school library computers, browsing Newgrounds and seeing everything from edgelord shitposts to literal art. There was so much to explore. It's technically still possible to experience most of that with Flashpoint and Ruffle, but it's just a time capsule. Steve Jobs killed it, the internet moved on, and now we have Tiktok instead (unfortunately).
Around my pre-teen years there was this flash animation site I used to use called "Doink." I pretended to be a Millennial teen while I shared my cringe furry drawings/animations and HTF fanart. Sadly, the team behind Doink shutdown their software in late 2012 and converted it into a mid IOS app.