"UWP does solve long-standing Windows problem, safely & easily installing & removing applications"
.............Is that not at odds with this Reg article:
Microsoft rethinks the Windows application platform one more time
Plan to bring most Windows apps to the Store, never mind security
https://www.theregister.co.uk/2016/04/07/microsoft_rethinks_the_windows_application_platform_one_more_time/