There is one part of this that I agree with, that is the part where you say that if you delete all items one by one (why don't they have a delete all?) you want

There is one part of this that I agree with, that is the part where you say that if you delete all items one by one (why don't they have a delete all?) you want them never to be visible for anyone again. The part I don't agree with is that you expect that the data is physically deleted from the server. I think and expect that big companies don't wipe all your data on command, they simply set a flag for deleted records. Really deleting the data also has a technical impact for them, it probably depends on the company's policy. It would be great if they did wipe all data but I really think most of them don't and have some sort of an aging process or really never delete your data.