I recently was running a variety of compressors over the course of days, and using Bash was great because, it doesn't parse the whole file before it starts running - I could edit and reprioritize next steps while the script was running. "Oh, that one's not working, skip the slower version" or "oh, space is an issue, work on freeing that up." It's a weird hack I wouldn't suggest in production, but it worked well for me.