You know, as a linguist-for-hobby, I understand why most of the english world says it /'zεd/ . (forgive my poor ipa, working with limited stuff.)
However, I still think it's retarded, and the same for all other current languages. It is literally the only carry-over from the more ancient system of letter naming, and the only other recent one that I recalls is "Æ". (If you didn't know, it's named "Ash"!) or Þ (Named "Thorn"!) (also this is only for english; Y is also treated this way in many languages, and I am actually unsure of why it is pronounced the same way as the previously mentioned word, "why" at all.)
I think that it's silly that just because Z was taken somewhat more recently than the other letters it should be exempt from the alphabetical simplification that has affected at least 90% of the english alphabet, and the only reason it's been latched onto is because... it just was.
Of course, as per descriptivism vs prescriptivism, I'll see whichever one wins out in the end and gladly analyze why it is.
but it's still dumb tho