I have not bothered by this topic that much so far, as I have been using a low-resolution screen. But now I have a 4k screen, and whooa, that is really bothering me.
It is not only the sharpness that is not correctly displayed. What bothers me even more is that any optical corrections are not applied. Look at this purple fringing in the image, if I want to have a look at the image in the whole view. It is almost impossible to look at, it is that bad.
And I would not say that performance is an argument. The laptop that I am using right now is quite weak and I do not notice much of a difference zooming in from 75% and higher.
Please DXO, do something about this! Give users at least a choice. You are giving users more and more arguments to switch to other software.