Yes, but both these have very different properties. He said (I don't know if its the case) that the db didnt have an autoincremental type. Postgres uses these sequence objects to implement autoincremental ids as he was referring to, they are implemented in-engine and are very fast and have already solved data races.

In the article, what he complains about is not about what a sequence is, but about implementing it manually with a table that is read, incremented and then saved. This us more expensive, and depending on how it was implemented you need to take care of the whole data flow so you are unable to allocate the same id twice. That's what he considers odd