[causi]

Not to mention how the modern web is also inherently much harder to archive than the old one. Permanently archiving an old site was an easy as dropping the URL into HTTRACK and bam, you have a full working copy on disk. Modern ones have so much dynamic and cross-linked content you might be able to get the text and images in the right layout.

[ciphol]

Depends which website. Any fully client side website can be archived and easily accessed forever.

The sites which (actually) require server side code tend to be large and commercial.