Immutable systems such as this one and Fedora's Atomics and CoreOS/Flatcar have their uses. Whether they make sense for you or for general desktop OSes is another question, but there are many situations where the approach makes a lot of sense.

Really, I don't see a lot of difference between immutable desktop OSes and Android or iOS. That model is not necessarily a bad one when you're rolling out systems that you don't expect the user to need to fiddle with the system management tasks you refer to. If I have 1,000 laptops to manage for a corporate environment, say, or for non-technical users who are not going to fiddle with drivers but might want to install Inkscape (or not).