Nothing happened to the 5.7x28 but that site is dead (or near dead). I blame Elite Ammunition for the demise. Was once a good site and good info/discussion on the 5.7.
A little known secret is that even supposedly non-armor-piercing rounds in that caliber, like V-Max, will in fact penetrate commonly worn soft body armor.
Just my opinion and probably should not have said anything about Jay Wolf. But either way, that site is dying which is too bad because it was once the best go to site for all encompassing info on the 5.7.
Gave up on going to fnforum a couple years ago for a few reasons but now that site is looking good. Guessing fivesevenforum members jumped ship and now post on fnforum.
The 5.7x28 is like sushi, you either love it or hate.