For disk usage, yes this doesn't address anything.

But for read performance (which is IMO what the section in the article was motivated by), it doesn't actually matter to have a bunch of entries corresponding to dead tuples in your index, provided Postgres doesn't need to actually consider the dead tuples as part of your query.

So if you have a monotonically increasing `job_id` and that's indexed, then so long as you process your jobs in increasing `job_id` order, you can use the index and guarantee you don't have to keep reconsidering the dead tuples corresponding to jobs that already completed (if that makes sense).

[This is because the index is a b-tree, which supports efficient (O(log n) page reads for n entries) seeking on (any prefix of) the columns in the index.]