Comment by whatnotests

All excellent points, especially about cost.

I've considered "faking" the append functionality by making a new file per append action, then performing a periodic compaction.

Even compaction-via-combine-and-delete-old is clunky.

    aws s3 combine --target s3://bucket-name/output-file.txt \
      s3://bucket-name/input-file-1.txt \
      ... \
      s3://bucket-name/input-file-n.txt

I, for one, would pay extra for that.