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When can your child stay home alone? Neuroscience suggests we’re asking the wrong question
(theconversation.com)
Author: Codie C. Lavoie - Pediatric Neurologist and Sleep Specialist, University of Southern California
Caregivers often seek a specific age that their child can be left home alone. However, the neuroscience of brain development suggests that readiness depends on much more than a birthday.
The article is relatively short, so I didn't bother with a TLDR since I'd lose helpful info. If you want, here is a short checklist
The earliest I remember my parents leaving me at home alone was 7 or 8. My mom didn't even necessarily tell me she was going somewhere. She would just be gone, and I'd start calling my friends' parents to ask if they knew where she was.