[ventegus]

They use EDNS for regional compliance, not for bandwidth optimization.

[josephcsible]

What specific part of regional compliance actually needs this, and why does no other website seem to need it?

[ventegus]

e.g. currently most media snapshots contain wartime propaganda forbidden at least somewhere.

RT content verboten in Germany, DW content verboten in Russia, not to mention another dozen of hot spots.

"Other websites" are completely inaccessible in certain regions. The Archive has stuff from all of them, so there’s basically no place on Earth where it could work without tricks like the EDNS one.