1. Hard for new team members to make sense of the overall system. 2. Repeated efforts: team A does not know team B has solved a particular challenge already and end up building something again. 3. When deprecating a service/API, no one knows who else is using it and the impact of stopping that service/API.
Within your organization, what documentation tools or practices do you follow to be make it easy to discover existing services/products, product PIC for it, tech PIC for it, etc.?