Yeah, the discussion there about apt-get had to do with whether or not it was a good idea to use apt-get to keep Tails up to date, INSTEAD OF d/l and burning a newer version. In other words, when a new version of Tails comes out, don't bother to get it, just use the update facility. They were saying you are probably better off getting the current version, in that particular case.The concern was the theoretical possibility that something would change in the Debian tree that would break some Tails functionality in an old version of Tails. Note that this has never happened, it was presented in a scenario where you never upgrade your Tails ISO.So you should always use apt-get to keep the version of Tails you are running current, and then update to the newest version as they are released.Finally, after running apt-get on every boot, your first visit should always be to the page:https://tails.boum.org/If there are any security concerns with Tails, including apt-get breaking any previous versions, that news will be on that page.tl;dr: You will always be more secure running apt-get every boot using the latest available version of Tails. The theoretical problem discussed with apt-get involved using it INSTEAD OF the most recent ISO.