Comment 14 for bug 1619188

You mean similar to what is done in Linux Mint, where there are different priority levels for the upgrades? It may help, but would be more difficult to implement, and can still cause problems, when the security upgrades accumulate.

I do not say that people should ignore the need for security upgrades. I think it is important to get a 'heads up' warning as soon as possible. This is done with the alternative 'Display immediately', which is the default in Ubuntu 14.04.x LTS.

Persistent live systems are sensitive, and it is important for the user to control, if, how and when to perform upgrades.

If the user needs higher security, I think it is better to use an installed system or a live or persistent live system made from the current daily iso file as described in the following link:

https://askubuntu.com/questions/817750/unattended-upgrades-broke-persistent-live-media

Quote: 'or grab the current 16.04 LTS daily iso file, and create a new persistent live system. You find it via this link: http://iso.qa.ubuntu.com/qatracker/milestones/351/builds. In your case, select a version of Mythbuntu, and you will find a link to the download information. (The 16.04 daily iso files will no longer be updated after 16.04.5 is released.)'