The last two times that Software Updater had anything to download/install, it
did so without asking for authentication. That is news to me, as it has
always asked for authentication before (i.e., as recently as last week). I
had _not_ run sudo apt-get update in Terminal beforehand the second time,
though I had done so the first time this happened.
In Terminal mode, sudo apt-get update _always_ asks for authentication.
My system is Trisquel 7 running on a Thinkpad T420. Plenty of RAM and disk
space ... nothing else running at the same time, though I had downloaded
emails first after a fresh start at breakfast in both instances.
Troubleshooting this new feature will not be easy, as I'll have to wait days
before something new comes to Software Updater.
In the previous few days, I have been downloading a lot of data (about 20 GB
in all) from a website using FileZilla, followed after each short burst with
deletion of those files from the website ... in the process getting rid of
password-protected client data that they no longer needed to access. Other
than that, there has been no unusual activity on my part.