What if we cannot afford the space of keeping everything backed uo forever? What if it has been a year? Where do we put the limits to "okay, this is stupid" and "this is perfectably reasonable"? What if the action cannot be reversed, and after deletion you need to anonimyze particularly sensitive data?

I say to all that, READ THE FUCKING MANUAL. If you are not apt enough to read and research about the software, you are not apt enough to use it.

Same with hardware. You cut your finger because you didnt follow instructions clearly laid out for you not to cut your finger when using a saw? Maybe sawing was not for you mate