You might have missed the big H2 section in the article:

"Recommendation: Stick with sequences, integers, and big integers"

After that then, yes, UUIDv7 over UUIDv4.

This article is a little older. PostgreSQL didn't have native support so, yeah, you needed an extension. Today, PostgreSQL 18 is released with UUIDv7 support... so the extension isn't necessary, though the extension does make the claim:

"[!NOTE] As of Postgres 18, there is a built in uuidv7() function, however it does not include all of the functionality below."

What those features are and if this extension adds more cruft in PostgreSQL 18 than value, I can't tell. But I expect that the vast majority of users just won't need it any more.