Tape vs. dope vs. both, is not a controversy. It is a point of discussion. An opinion. Same for putty vs. silicon. Old fogie types like me, and maybe some others, do somehing because it has always been reliable for us, so change is hard to come by!
Now, AAV vs. NOT....that may be a controversy.
PVC vs. ABS....some area you may not have a choice. Supply house will stock one or the other, but not necessarily both.