This page makes an important point about keeping your data safe but it misrepresents what the Mandela Effect is. It gives a good definition in the first paragra

This page makes an important point about keeping your data safe but it misrepresents what the Mandela Effect is. It gives a good definition in the first paragraph "the phenomenon of large groups of people misremembering the same fact or event in a similar way". But further down they say "It’s a common misconception that data stored in the cloud is automatically backed up". That's not the same thing at all.