The https://element.io application (which is built on top of https://matrix.org/) continues to improve. It seems chat is an important aspect of maintaining relationships in a distributed team or community.
Are there examples of other OSS projects using matrix?
Many projects still use IRC and a lot of projects use Slack. Even though Slack is nice to use, it has its problems being a proprietary system.
Are there any downsides of Matrix/Element over IRC for community chat?