I've noticed that pkg installers and obviously apps installed from the App Store) put apps in the /Applications file, yet Steam usually puts them in ~/Applications. Both work, and both are writable by the user, but are there circumstances under which one should be done over the other?
I am the only user of this computer, and shared folders aside, I've disabled guest access.
(this is coming from a Linux user, so having a root folder be writable seems wrong, unless my permissions are wrong from the start)