Should I learn process builder for admin certification if it will retire from Salesforce?

Hello All,

I am preparing for my admin certification and I'm not sure if I should prepare Process Builder and Workflows as It is there in Prepare for admin certification trail but I recently read that Process Builder and Workflows will retire very soon from Salesforce. 

I do not understand if it is a feature going away soon why is it there in "Prepare for admin certification" trail? Why don't we have more information on Flows instead? Should I do the trail or lookout and preapare modules for Flows?