engineers who work in large teams on some component, talk about the design with their managers? Yes you can replace them. Firing the maintainer and author of 9

engineers who work in large teams on some component, talk about the design with their managers? Yes you can replace them. Firing the maintainer and author of 90% of the commits of the OSS project your company is relying on in a way that it is hard to migrate away? Who can replace them??