We now know that Android Jelly Bean is now running on about 50 percent of all Androids, and the arrival of Android 4.4 KitKat should roll out to even more smartphones, but many manufacturers still have not yet delivered 4.3 for their devices. This is not necessarily a death sentence for your phone though, as CyanogenMod has just introduced the 10.2 M1 version of the custom ROM which will allow many users to update to the 4.3 code base.
CyanogenMod 10.2 M1 is based on Android 4.3 Jelly Bean. The M stands for milestone, so it is the first major offering on the way to an absolutely stable release candidate. More than 70 devices are supported by CM 10.2, and the current version is reliable enough for daily use.
CyanogenMod has already confirmed that they are also working on a version of the 4.4 KitKat code base in parallel with the 4.3 release. The decision on which devices will get 10.2 M1 support is being made as we speak, so you may have to wait a few more weeks to find out if your device will be on the list. The development of CyanogenMod 10.2 will continue even further, of course, before the completion of an absolutely stable version appears, but in the meantime, this is about as stable a version of Android 4.3 you could ask for on your device if your manufacturer has forgotten all about you.
Do you run CyanogenMod on your phone? Nightly or monthly builds?