For me snapshot is actual copy stored on a different hard drive or other medium. So copy operation is never going to be instant.
Scenario in the article is power loss so that is also not something I worry about that much. Mostly I worry about hardware failure where I would not be able to turn on my laptop/server again. For power loss UPS or battery in laptop is my go to solution.
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Different people care about different things :)
I also think about snapshots differently.
For me snapshot is actual copy stored on a different hard drive or other medium. So copy operation is never going to be instant.
Scenario in the article is power loss so that is also not something I worry about that much. Mostly I worry about hardware failure where I would not be able to turn on my laptop/server again. For power loss UPS or battery in laptop is my go to solution.
The snapshot takes a second to generate; then you can take as long as your hardware needs to get it somewhere else.