For all you armchair types.... if you do actually purchase body armor you'll find out very quickly how little fun it is to actually wear the stuff.
During a 22 year career as a cop in south Florida I bought my first vest (second chance brand) after a year on the force. It was later replaced by issue vests and I actually wore them in uniform all those years. Hot, uncomfortable, and lots of personal hygiene type issues is a normal day wearing even the lightest models.... I knew many officers (even ones in fairly high risk areas) that simply couldn't wear the stuff. On my own Department there was consideration given to make wearing them mandatory... but sensible leaders realized that it had to be something an individual could live with so we never adopted any such rule.
What many should consider is the number of officers killed each year that were wearing body armor.... Lots of important body areas aren't covered, but the stuff will cover quite a bit and it was nice to know that I might be able to last long enough to win a fight, if it came to that.... One side benefit for young officers wearing the gear was that they tended to fare much better in bad car accidents that guys without body armor..... and car crashes end a lot more law enforcement careers than injuries from hand to hand or weapons involved encounters -- hands down.
Now that we once again have lots and lots of real combat vets joining police departments, those individuals will go on to shape equipment and tactics choices for the outfits they join. That's pretty much what happened in my generation (USARV, 101Abn, 1971).