As the article points out, this is only an issue with UUIDv1. They claim "However, it is what most applications use." but I have no idea how true this is. I was under the impression that the vast majority of UUID generators were v4 by default. For example:

Postgres only offers random uuid generation (https://www.postgresql.org/docs/15/functions-uuid.html).

The `uuidgen` CLI tool, at least for modern versions (I have not checked historically), says (from https://man7.org/linux/man-pages/man1/uuidgen.1.html): "By default uuidgen will generate a random-based UUID if a high-quality random number generator is present." (later it lists /dev/random as such a generator, present on almost all systems)

What's an example of a system that generates v1 uuids by default?