@beowolf I do see a lot of your points. I guess when I think of straight load impact, I think of the horses head getting smashed in to whatever is in front of them; I would not expect a chest bar to stop that much weight if it gets thrown forward. I guess in the “pick your poison” aspect, I’d take my chances with a horse going sideways, rather than head first. Any and all of this would be a terrible situation regardless.
I will say, since this thread has morphed in to a lot more than just pros and cons… There’s been a lot of discussions lately on various trailer types. I’ve done some shopping and there are some really cool new features and designs (mostly in slant loads, haven’t looked at any straight loads). One thing I wouldn’t ever consider is a trailer in which the only way in and out is through the side. There are some that have a solid rear tack, and side loading ramp. It gives me the hebies to think if the trailer ended up on it’s side, the side that the door is on, I have no way in to the trailer. It takes some creativity to think of a scenario where the trailer will end up on it’s rear end (back doors), so those would likely be accessible, unless you’re rear ended by another vehicle. But something for new trailer shoppers; think of the situations your trailer could end up in, and which doors you will be able to get in. If your only doors are on the side, and the trailer ends up with that side down, you have no choice but to use extraction equipment to get in.