Why is 1996 the cutoff between Millennials and Gen Z?

I myself was born in 1997, and I certainly don't feel like my life or the world in which I have grown up in has been so much different from those who are literally only about a year older than I am.

They say that Gen Z people were born into a world of advanced technology while millennials had to grow into it (as the tech came on the scene when they were in their teens and young adult years).

Well I'll have you know that I too had to grow into the technology (at least just as much as anyone born in 96 would have to). I didn't even start using computers/internet so frequently until I was around 11 or 12 or so. I didn't get my first phone until I was 11 and it was an old school flip phone. Etc...

I know that there has to be a cutoff somewhere, but 1996 vs 1997 doesn't seem like a good cutoff to me.

I feel like a generational cutoff should be marked by significant events and/or inventions/innovations in history.

For example, I could see 2001 being a cutoff because America (and to some extent the world) went through some big changes and tensions as a result of September 11th, 2001.

I could see cutoffs being something like:

"Here we have the generation of people who lived before World War 1"

"Here we have those who grew up during the great depression"

"Here we have the Vietnam generation who were afraid of being drafted"

Etc...

Heck, I could even see 2000 being a cutoff simply because it was the start of a new millennium.

What big change happened in 1996 or 1997 however that warranted a generational cutoff between those two years?