unclemez not exactly what you read that have been applied to common distros but something flex and easy but yet making the system more robust and almost unbreakable
what I'm reading that is common in these new immutable distros is 100% Flatpak, everything containered, and while user is allowed personalizations not much else is changeable. these concepts, for me at least, take a while to wrap my head around (if I understand it all, that is)