There is (was?) also a terrible flaw with this, in that any site hosted on Notion (even using its own domain) would show you public pages with a valid page id.

There is (was?) also a terrible flaw with this, in that any site hosted on Notion (even using its own domain) would show you public pages with a valid page id. So, if Paul Graham hosted his site via Notion (he doesn't), I could link someone to `https://paulgraham.com/Why-I-Hate-Hackernews-be2839f0-e145-4202-8a59-ae8601815498-7486f0dbb77a42a4896d4a312e556206 https://paulgraham.com/Why-I-Hate-Hackernews-be2839f0-e145-4...` and it would show my (fake) page on PG's domain.