Try to understand what you comment on. Users blindly used this env var and break their system. Inside flatpak it's required to work but outside it could be run

Try to understand what you comment on. Users blindly used this env var and break their system. Inside flatpak it's required to work but outside it could be running in a process that shouldn't be using the portal for various features. There are also various xdg-desktop-portal bugs that need to be fixed there first. Like some portals fail on the host.