Since the creation of that map Canada and Denmark have gained a border (Hans Island). That barely registers on any traditional map but would dramatically rearrange this.
EDIT: Or maybe it wouldn’t? I don’t see Russia’s border with Lithuania and Poland reflected (due to Kaliningrad) so maybe only the “main” part of a country is considered?
Looking at the author’s Reddit post apparently things like exclaves were intentionally omitted for simplicity’s sake.
https://www.reddit.com/r/MapPorn/comments/gxwn5r/oc_the_topo...
Still doesn’t explain some things, like, why is Singapore (an island) shown on the map as having a border with Malaysia? Other countries connected by bridge or causeway (Denmark and Sweden, Saudi Arabia and Bahrain) aren’t shown as sharing a border.
You just opened my mind. I was absolutely convinced that Singapore did share a land border somewhere.