I remember those type 07 style vests. They were somewhat similar to the US Army's vests adopted in the early 2000s, but they lacked the ability to stop rifle ammo, particularly steel core ones (say SS109 green tips). However, they were indeed effective against pistols, grenades, shell shrapnels, blast waves, etc. Not sure if we have the exact data about the new vests from 2019.
As with the crotch plates. The USMC, US Army, and the Russian military still use them, based on what I heard. However, I know many European militaries stopped using them (or never adopted them in the first place for the reason you mentioned).