Larry,
Well, I've never heard of brazed ribs coming loose, and I've come across hundreds of those ribs in the form of beater, 80-100 year old, Halifax and low end Darne clones.
I bet its pretty hard to get silver solder to stick to remaining braze for a repair, also.
I'll cautiously venture that a soldered rib is easier, and, a more frequent repair than a brazed rib, which, might not be a feasable repair.
Like I said, if the Uggy pops, it will be somebody else's "parts gun".

Best,
Ted