The second number stands for the number of major updates. The third number stands for the number of bug fix patches. If you are on v0.16 and haven't run into any bugs, there is no reason download v0.16.2.
oh gosh,dude are you serious? I have asked this similiar question to you 4 times already, everytime some wierd answer, I ain't asking you the date you upgrade your avn on, I'm asking whether it's going to have an ending anytime sooner or not,if it's going to be going on for few years before having an ending,or it's near to having a proper ending,but you never understand the question, I'm tired of this site.
Good bye dude,best of luck for your avn.