The reason the textile wore through where it did is because it was over the back protector (a hard surface, with no give). Basically, I look on textile gear as being more or less disposable... it'll do it's job in a crash, but you'll
probably be replacing it after.
I've never dealt with blood or road rash on anyone who's crashed in leathers, or textiles, but I have with the kevlar jeans.Truth is, the extent of damage gear takes in a crash is dependent on a lot of variables... speed, type of crash, duration of slide, what's under it... but leather has proven its value over and over.
There's a guy on the forum who periodically points out that he crashed naked and didn't get any injuries (I don't even want to
know the backstory on
that...), but is that how anyone would want to crash? Probably not...

sometimes it's luck. But I don't want to count on luck, so I wear leather, no matter how warm it is (and I regularly go out riding in triple digit temps).
I own a textile jacket. I've never worn it. In fact, I'm doing a gear give-away later this month, and that's one of the things that's going.
Personal safety and personal risk are just that- personal. Make your choices, take your chances. To me, the sport is risky enough without adding to it by cutting corners with gear.