I've had:

1 QR completely fail to release, dragged across East Beach at high speed between trees, signs, and moving cars... slid to a stop at the mangroves on the other side when I finally managed to get unhooked.

3 times I've fumbled for it in a kitemare and missed it... luckily only scraped up and shredded booties. Cold hands, no time to look down, couldn't find the little red loop.

Since then I've put a stopper ball on the pin so I can find it without looking.. and I launch with my hand on it if launching hooked in.

Not perfect but better. Pull loops require too much effort to locate unless they are huge, and then you risk hooking into the loop itself by accident.