Difference between Lineage OS and Cyanogenmod : how does it affect current users?
Here are some answer, but as I'm not Cyanogen representative, they only engage me.


Users will not receive OTA updates as soon as they stop maintaining their software stack. You keep on using your last Cyanogen ROM and hence receiving no more security updates, or you can change the ROM you install. For changing, you could use an entirely new one and try to wait some guys start a fork of the project (this will, for sure, occur: perhaps you'll be one of them). With a fork it is possible they will choose to support upgrade from the last Cyanogen.
Nothing, you just will not receive updates and you will risk more and more because of missing security updates.
As you will not be able to update, your phone will keep the same software stack as it is. Bugs, security and stability will stay as it is in your last Cyanogen. For bugs &amp; stability, you don't care but for security it is a pain (as security will go down as time goes on).