Quickwit is targetting logs:

    - it does not do vector search. It can rank docs using BM25, but usually people just want to sort by timestamp.
    - its does not use an SSD cache. Quickwit reads directly into the object storage.
    - it is append-only (you can't modify documents)
    - it scales really well and typically shines on the 1TB .. 100PB range
    - it has a Elastic search compatible API.