The latest 12.1 version of the OS was finally released. So if your device currently supports CyanogenMod 12, it is most likely updatable to 12.1, which is, in fact, based on the AOSP version of Android 5.1. This brings the popular custom ROM up to date, seeing how Android 5.1 is currently being seeded to Nexus devices, as well.
Cyanogen developers also promise that the new version is directly installable over an existing CM 12.0 install, so no data loss should occur. The challenge is finding the proper, Android 5.1 compatible versions that don’t crash on the new OS.
Some of you might remember a recent news about apartnership between Microsoft and CM, for the integration of Microsoft apps and services into the Cyanogen ROM. However this story was quickly debunked. In the team’s words:
We are not bundling or pre-installing Microsoft (or any Cyanogen OS exclusive partner apps) into CyanogenMod.
Now, without this, we can happily enjoy CM 12.1. But, if you do hop on the new version, let us just remind you, that it is a nightly build and as such, bugs of all caliber are expected.
The official download page for the custom ROM is currently down, so you probably have to check back later.