I don’t know about never regretting. “set -e” is the right choice the vast majority of the time, but definitely has some gotchas to it. For instance, what does the following script print?

  #!/bin/bash

  set -e

  (
   echo "Start of Subshell"
   (exit 1)
   echo "This shouldn’t run, right?"
  ) || echo "Subshell failed"