There are some cases of real churn in Linux but they're rare. The new init systems and such come with plenty of useful features that simplify many administration tasks: the reason for people being so unsatisfied with them is that they bring lots of what's effectively cowboy-coded hacks and prototype-quality code in order to enable these features. But rewriting all of this stuff from the ground up with a clean, Unix-like design (or rather, Plan9-, Limbo- or Amoeba-like, given that Linux now supports the needed foundational features for these) while preserving its feature set would involve more rather than less churn.
> or rather, Plan9-, Limbo- or Amoeba-like [design], given that Linux now supports the needed foundational features for these
I‘d be curious to hear more about what you're referring to, if you were willing to expand. What foundational features are new to Linux that would be really useful for cleaner init system (etc.) designs?
A lot of useful material with near-official status is kept under the Linux Documentation Project, https://tldp.org/ They have a git repository at https://github.com/tLDP/LDP
There are some cases of real churn in Linux but they're rare. The new init systems and such come with plenty of useful features that simplify many administration tasks: the reason for people being so unsatisfied with them is that they bring lots of what's effectively cowboy-coded hacks and prototype-quality code in order to enable these features. But rewriting all of this stuff from the ground up with a clean, Unix-like design (or rather, Plan9-, Limbo- or Amoeba-like, given that Linux now supports the needed foundational features for these) while preserving its feature set would involve more rather than less churn.