palo wrote:I found that some outdated software had to be brought up to snuff with PPAs etc.
The LTS is for users that, after having done the initial installation, don't want to have to worry about their computer and just want to continue to use it as installed. The security team manages security issues and ensures you get timely upgrades for packages on which security issues have been found. You do not get upgrades of packages for new features, for that indeed you would upgrade to a new release. This ensures you can expect for the full support period to have a stable system and stable applications, with any security issues managed by the security team.
Versions with new features would naturally introduce new bugs (and security issues), may not be fully compatible with older versions, or may even work differently. Average users may not have a need for the "latest & greatest" of all their software "just because it is available". Having a stable and functioning system, that they can continue to use without worry, is generally more important to average users.
If you have a few select applications for which you need a newer version because of some new feature you need, that is what PPAs are for
The LTS gives you the option to install once and continue to use it for 5 years without worry. All the above goes for normal releases as well, just that a normal release only has 18 months support.