For projects that span multiple teams, potentially on diverging meeting schedules, it needs to be possible to collaborate asynchronously. The goal for InnerSource projects is to recruit new contributors. For that, potential future contributors need to be able to follow the project progress on a self serve basis with a very low barrier to entry. If project relevant communication happens through synchronous communication, arguments discussed need to be made transparent in the written channel - decisions should be finalized only there. As a side effect this leads to passive base documentation that is very valuable for any newcomer to the project.