Key features mentioned in the release notes are:

    - Bloom filters for queries ('needle in haystack' problem)
    - Native OpenTelemetry support
    - Updated helm charts
    - Lambda/Promtail support dropping labels
    - Docs improvements

Personally, I'm thrilled that the problem with high-cardinality labels will [hopefully] get addressed after 6 years (that's the top item, with bloom filters).

The architecture Loki has chosen is great for keeping costs down and using simple blob-storage (S3) for data. However, it makes it hard to quickly query unique keys such as trace IDs or user IDs. But bloom filters will hopefully will do the job.

I raised the needle in haystack problem back in 2018, so it's great to see this landing:

https://github.com/grafana/loki/issues/91

For anyone that's curious, bloom filters is a clever technique:

https://en.wikipedia.org/wiki/Bloom_filter