I increasingly believe time travel (itself an artifact of life inside culture, itself an artifact of language brains) is our biggest differentiator from primates. This simple machine for 10-second time travel is quite powerful. Addicts are finding the 5-second machine useful for controlling cravings. https://melrobbins.com/the-5-second-rule/
I'm reading the new San Francisco sci-fi novel All The Birds In The Sky and one of the protagonists builds a 2-second device.