They paused funding for all of the exciting P2P and low bandwidth stuff last year. Hopefully it resumes soon, as mentioned in the GitHub thread.
https://matrix.org/blog/2023/12/25/the-matrix-holiday-update-2023/#In-other-news
Meanwhile, P2P Matrix and Low Bandwidth Matrix is on hiatus until there’s dedicated funding - and Account Portability work is also temporarily paused in favour of commercial Element work, despite the fantastic progress made recently with Pseudo IDs (MSC4014) and Cryptographic identifiers (MSC4080). Given P2P Matrix and Account Portability were the main projects driving Dendrite development recently, this may also cause a slow-down in Dendrite development, although Dendrite itself will still be maintained.
Yay! Been waiting patiently.