Nothing wrong with Split rims at all.
The problem comes from 18 year old tire jockeys that have no skill, brains, eyes, common sense, etc.
Everyone here can use a snapring, correct? If the snapring is showing more edge on any side more than the other then it is not fully seated and ya know its going to pop off, right?
A split rim is the same. The split ring has a 3/8 inch edge that sits inside the rims groove. If ya cant see 3/8 of an inch then your either blind or stupid.
The whole 3/8 needs to be INSIDE the rim groove before ya air it up. If its not fully seated like a properly installed snapring then it WILL blow off. No surprise there.
It dont get any dumber than army infantry and vehicle guys. They can change a split rim in the dark out in the field. The army has been using them since the turn of the century.
The heavy equipment industry has been using them for decades too. I cant imagine trying to get a 24 ply, 3 inch thick loader tire stretched over a fixed beadlip.
My and my hairlip buddy Paul have mounted tons of them with no issues.
Danger like to aim at dumb folks.