In any case, as far as when grindcore jumped the shark, I'm going to go with 1998. So yes, I am a decade late in writing this, which means I'm old, but we've already established that. But back on topic, 1998 was when bands like Locust introduced the sweet sounds of grind to skinny kids with black hair, and it was all down hill from there.
Grindcore band members then:
When I was a kid, grindcore was for weirdos that, in the words of Chris Dodge, spent most of their time watching porn in their mom's basement and writing angry letters to Maximum Rock N Roll. And that's the way we liked it. Bands like Nuclear Death, Gut, Hemdale, 7 Minutes of Nausea, Meatshits, Malicious Hate and Excruciating Terror were by losers and weirdos for losers and weirdos. Someone in a grindcore band back then was probably a high school dropout with rapist glasses that worked as a drill press operator at a machine shop. Nowadays most people in "grindcore" bands are 19 year olds with MySpace hair.
Grindcore band members now:
I know you can't expect things to stay the same forever, and I wouldn't want them to. For example, it would be a tragedy if Cianide was still a band. But I wish that grindcore had the same kind of gritty, scumbag appeal that it used to. Even stalwarts like Anal Cunt have sold out. Did you know that their albums have had lyrics and music for over a decade now?! What happened to the old days of the 5,643 song 7".
I tell you, it's a sign of the times.