I am an '82 kid. Our Apple IIe computer lab was part of a grant to put technology into the hand of rural school kids and we got to use them starting in 1991. And only the school system, or rich parents, had computers. And even then it was dialup until 2000 or so (unless you were at the school).
I didn't get a cell phone until 2003, three years into college. The fanciest piece of technology in my home was our VCR and DirecTV receiver (and we didn't get DirecTV until '97).
I grew up playing outside. I played county sponsored summer sports where we **** well always had a losing team. I don't fit with the Millenial description fully.
My brother, a '92, does. He grew up with all that technology always available to him. He never knew about dialup. He had a cell phone throughout HS. His summer baseball league never tracked wins or losses. The Internet of Things has always been intertwined in his life.
Yes, generations are just fancy labels to make us feel "good" or sell is sh**, but the dates vary by our experiences. I would absolutely agree that for coasties and large population centers, Millenials start at '80.
For flyover, it depends, but I'd blur it to be closer to 84/85.
I fit more with "Empire Records." My brother is more "Superbad."