I'm assuming you have just arrived from 1996. I can't wait until you find out who our President is!
It's also not adding any features that weren't already there, unless you're objecting to the entire WebAssembly project, in which case I guess that's allowed, but a bit off-topic.
Is this bad for the long term preservation of knowledge? Sure. But it's the world we made.
https://en.wikipedia.org/wiki/PDF/A
That said, the comparison I was trying to make was the pre webapp web to the current web. We have AOL today, just not one big company running it. It will mostly be lost because it's not legal to save it.
The future will know us through scraped videos from Youtube before it was taken down suddenly and without warning in the mid 21st century due to corporate politics and/or the takeover of the government in DC by descendants of the house of Habsburg.
So, it's actually pretty cool.
Also, the web browser has been an application platform for nearly 20 years now, so I'm not sure I understand your remark.