We have two tags for the same thing: dxa and reference-implementation.
The new name for the Tridion Reference implementaton is DXA: Digital Experience Accellerator, so I think we should keep only dxa. In the tag wiki we can explain that it is the referene implementation also known as TSI, STRI, TRI or RI.
In case we keep dxa: All questions with dxa are also tagged with reference-implementation. So we can 1) remove the dxa tag and then rename reference-implementation to dxa.