Adobe Reader 32bit vs 64bit

Hi, when will the 32bit version of Adobe Reader be end of life?
I guess the 64bit unified will sometime replace the 32bit "old" Reader install because why would Adobe maintain 2 different applications when the unified application is enough.

Is there some information on that?
The best would be a Timeline because many companies still use the 32bit version and need to test the 64bit version before it will go EOL.

Kind regards 

Luca