Python suffers immensely from this - libraries tend to reraise exceptions with a new, descriptive type, but usually don't append the stack, and essentially can'

Python suffers immensely from this - libraries tend to reraise exceptions with a new, descriptive type, but usually don't append the stack, and essentially can't chain any custom data you may have added. Not having the complete causal chain can seriously hamper debugging, and unless it's built in it's unlikely to be adopted consistently. Python 2 has nothing, and libraries haven't agreed on anything. Python 3 has "raise ... from ...", which largely resolves it, but I'm not sure what adoption is like. Anyone know?