Big distro. These fat-cat volunteer kernel devs are just trying to keep us down by giving us so much free software that we collapse under the weight of it.
Corporate developers are typically paid to solve corporate problems. Sometimes a company will hire a big-name OSS developer and tell them “continue maintaining your project in whatever way you think best”, but that’s by far the exception rather than the norm.
Eg, this article.
https://thenewstack.io/contributes-linux-kernel/