I think I will have to agree with Tim Sweeney on this. There is no reason for Universal Apps other than closing the system and thus becoming a copycat of Apple and Android... and just look at the 'rooted' mess it has created :rolleyes:
There is a non-recommended way to close off the entire shitty Universal mess in windows, at 'HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System' make or alter a DWord entry named 'EnableLUA' and set the value to '0'.
That stops any and all universal apps, but while Microsoft Store (needs windows update service running as well as firewall running) and a few other options seem fine to not have to hazzle with, they have managed to block the option more or less by making Windows update and other settings Universal apps as well.
What it means is that Microsoft does not present the Universal Windows platform as any real alternative but rather choose the ever emerging 'force feeding' route and so it is hard to disagree with Sweeney in his argument.
Fwiw, there is a download to turn off the whole Universal Armageddon, first posted in this thread related to old games. It goes a little further than absolutely needed as it also includes turning off the compatibility engine, but to be able to check out Windows 10 without Universal Armageddon it achieves its goal. It does come with a script to turn it on again so you will not get stuck.
Unpack the ZIP and right-click 'StopPCA.bat' and select 'Run as Administrator'. To reverse it, right-click 'StartPCA.bat' and select 'Run as Administrator'. Both scripts reboots your computer after prompting you to hit a key.