The idea ForEach person to write just one single web page is really wonderful. I'm going to have to deeply ponder that and make one.
While I really like the permanent web and losing centralized control over data is a price worth paying (.... no wait, I would pay money not to have this.) the winning method of making cars last 100 years is maintenance not build quality.
That said, here are some similar ideas of mine:
I often add a torrent magnet uri when I link to youtube. I seed those torrents myself and sometimes someone helps. If the content was good enough and yt deletes it for whatever [stooopid] reason there would be more seeds.
Here http://dr-lexus.go-here.nl I, in stead, try to "sell" the idea that [besides from stuff breaking] people use and will use a combination of Adblock Plus, NoScript, RequestPolicy, Ghostery and JSOff to break your stuff.
You can put a really tiny bit of css inline and at least render the page properly if the css fails for whatever reason.
I really dislike how our websites merely provide just one location for everything so I wrote this:
<img src="http://example.com/img.jpg"
data-x="0"
onerror="a=[
'http://example.com/img.jpg',
'http:/example.com/img2.jpg',
'http://img.go-here.nl/michael-faraday.jpg'
];
this.src=a[this.dataset.x++]" >
The page has an example failing back to data-uri which imho looks surprisingly decent for its size. Its way better than having a hole in the page.