Hi Turá I think it’s because x can be an abbreviation for the prefix trans because trans means cross or across and the letter x is like a cross. I could be wrong though but that’s my understanding 😊

I'm not sure, but it probably relates to similar terms like UX (User Experience), CX (Customer Experience) and EX (Emotional Experience). The people who created the term 'Design Transformation' probably wanted the abbreviation to look similar and feel 'cool'.