It seems that every single year there is a new EOL (end of life) of FS version (e.g. 1.4 at this time) and a new version series that replaces it (e.g. 1.6).
The problem is that it's not a simple act to update production servers.
When you have a lot of servers (in different clients and locations) it's even harder.
Many products, including Linux, and even Asterisk have LTS versions, and newer releases versions.
The new releases has new features and way to do stuff, but the LTS get bug fixes and are stable for long period of time (usually 5 years).
What does it take to have LTS version with FS, that the new releases will not stop, but EOL will be much longer for some of it's versions?