Lots of inaccurate info in here but also some valid points. UWP sucks really bad and it does reduce the reliability of the system, especially when UWP-type things end up in the shell (e.g. start menu and action center). I will point out that File Explorer includes a shortcut for opening PowerShell at the current directory, which can be triggered through the File menu or alt-f-r. Its worth highlighting that Linux isn'…
(I'm going to venture a guess that the "kernel update [can] render the system unbootable" is due to nvidia binary-blob driver needing some glue code to both update and recompile for new kernel versions ... it can work fine, usually, but for best experience, skip the hassle of nvidia on linux, or keep it as simple and vanilla as possible with a distro that takes care of it for you I guess.)