Loki: index storage + object storage roadmap

Hello folks,

I am new to the Loki solution.
May I know where can check the roadmap of the index storage+object storage ?
2.9.x documentation mark deprecation in boltDB and other index storage.

Best regards,
Pui Wong

Answering my own question.
After checking the issue discussion, the “next” version document recommend to use tsdb as index storage and object storage.