That doesn't really answer any question i made though. Is it something specifically about Windows 10X and MSIX limitations? How would i use it? Etc (i do not want to repeat my questions, i'd just copy/pasting them :-P).
It's a fix for a limitation of the Windows app model, i.e. to the OS's knowledge of which executables, processes, files, etc. logically belong to which apps. MSIX is how you register an app with the OS so in that sense it's about "MSIX limitations" but apps/runtimes not installed with MSIX still have the same problem.
The OS knowing what's logically the same app vs. separate apps is a prerequisite for 10X and sandboxed apps, but there are other features usable by non-sandboxed apps that depend on it too.
