It depends on the individual child IMO. You cannot generalise.
We sent ours on long train and plane journeys from an early age (8,9,10) but didn't leave them alone in the house until they were quite a bit older.
Friends' stories of houses wrecked didn't help!
I begged my DM to allow me to stay home when she went on holiday when I was about 15 but after a couple of hours I was lonely. Luckily an older sister came home to keep me company.
Giorgia Meloni Gives Trump Both Barrels!


