I don't know what you see at your homes, but at my house I see dinner vanish in less than 90 seconds. My dogs spend far more time running around with noses on the ground, sniffing things, in fact they spend a huge amount of time with their heads to the ground on a daily basis. Seriously, how can that not cause strain but the few minutes it takes to eat in that position will cause neck strain? That makes NO sense people! None what so ever.
I feed Kinder in raised bowl because the woman I got her from INSISTS. She doesn't like it much and would clearly prefer not to. In fact, I have bowls of water out at all times on the floor for the cats, and Kinder has her raised bowl. She drinks from the floor, every, single time. Both are stainelss steel, same water, changed at the same time, in fact the bowls are even the exact same size.
Didi eats from the ground, same way all of my dogs have for the last 20 years and I've owned Boxers, Collies and GSD, all large, deep chested breeds who are more susceptible to bloat and I have never had a dog bloat, nor have I ever had a neck/spine issue. I feed smaller meals, twice a day. We dont feed immediately before or after exercise and the dogs are kept quiet for an hour or so after eating.