Yep. Sometimes crashing isn't an option. There are places in network & systems code that have seemingly complicated but darn important many permutations of st

Yep. Sometimes crashing isn't an option. There are places in network & systems code that have seemingly complicated but darn important many permutations of state that already exist. Sometimes the differentiation between error conditions requires a combination of conditions (i.e., talking to an existing legacy system.) As for single-threaded map, there are at least two necessary behaviors that handle errors very differently: 1. batch all errors/exceptions/etc and return them as an array 2. return on first error