Samer -- exactly the point I made, further upthread.

There needs to be symmetry. "Gen X," "Gen Y," "Gen Z," and "Gen AA" (double-A) or "Gen Alpha" should be used in the same breath.

Or, if using more descriptive adjectives: "Xer," "Millennial," "Zoomer" (or "Centennial"), and "Alpha" (or "NuAlpha") work well together, as linguistic complements.