+@item recursive, indented and serialized logs display ability, with
+ priority to the depth and bad return codes, like in @command{apenwarr/redo},
+ thanks to @url{https://apenwarr.ca/log/20181106, apenwarr's article}
+@item all environment variables, working directory, command line
+ arguments, start/finish times, duration, participated PIDs, return
+ codes can be saved for later investigation