On the official forums for Strauss & Howe generational theory, the community uses "Gen Y" to refer to late-wave Gen X-ers and early-wave Millennials who have some of the social characteristics of both generations due to being on the cusp.

The exact years are nebulously-defined (cusps typically are, since they're unofficial extensions of the theory), but I've seen it defined as wide as people born 1977-1988. Mid-80s are almost universally accepted as part of the cusp, but how early or how late it extends beyond that seems to vary.

Digital natives drove them to extinction.

Yeah. "Millennial" is the catchier brand name for what was at one point being called "Gen Y". It's essentially a born on or after 1980 catchall

Too many people from Grn Y don't ask enough questions :/

Correct.