Seems like a really cool tool. I bet when more manufacturers find out about this is will be a popular way to build. Will ESEE see the applications for future sheaths? https://www.fatlazycatknives.com/product/tri-fold-joint-tool
I've cracked a couple of Kydex sheaths, so I wouldn't expect this to be a solution for a hard use case. It would probably be fine for small knives living in an edc environment though.
that sharp bend looks like it would be a weak point and susceptible to thermal cycling and cracking in extreme temps...