Instead of just integrating changes properly with the packages in the ubuntu archive they instead suppress doing (security) updates at all for them. i would say forcefully keeping a vulnerable kernel browser or xorg in place instead of allowing the provided security updates to be installer makes it a vulnerable system, (sic).
I personally wouldn’t do online banking with it.
W wypowiedzi można nawet się doszukać, iż programista nie używałby tego systemu do bankowości internetowej. Chwilę potem w podobnym tonie wypowiedział się deweloper Mozilli oraz członek zespołu Ubuntu – Benjamin Kerensa:
It is unclear why Linux Mint disables all of their security updates. I can say that it took them many months to get a fixed version of Firefox packaged while Ubuntu and Debian had already had security fixes in their package.
This puts Linux Mint users at risk and is one of the key reasons I never suggest Linux Mint to anyone as an alternative to Ubuntu.