User-entered information is sacred.

Once again about the same. There is one simple rule:

User input is sacred. It is necessary to make every effort so that it does not disappear and be easily accessible.

Is this rule so difficult to understand, remember, and apply? (A rhetorical question to software developers)
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Why in the super-duper browser Opera, I lose all the text entered into the form due to accidental closing of the tab or freezing of the program ?! (Rit. Vopr.)

Is there really no place for my kilobyte god-given in the 21st century on a half-hard disk? Why do razbotchikov have time and desire to engage in some minor baubles, without properly providing basic functionality? (pit)

Update
Opera cited solely as an example. Ensure the safety of the information entered by the user should any browser and any software. By default and without additional efforts from the user.