Can you imagine people 100 years from how reading our posts? I hope they are more enlightened than we are.
I can see how this can be a good thing. Information can be archived that might otherwise be lost.
I am curious though: web formatting will probably change a lot in the future. It might be a struggle to make an archive compatible with future formats. Take old games like Baldur's Gate for example (not the enhanced version): it has to be emulated on PC now because it was originally made for Windows 98. I actually found that surprising.
Code will change, and the structure and layouts and resolution and styles will change. It might be like looking back at 70s haircuts.