That feels a lot of losses that you have never recovered but then, looking at the brighter side and can't complain with that situation that it's better to have those two rather than have nothing back.
I don't think we can call that a loss, because a loss would be to get less money than what your coins were worth back then, or at least less than what you had invested, but if you are getting coins worth more than what you were holding at that time, you are not at a loss, but it's just that if you could get all your coins from back then, then it could give you a great boost because their worth must be way higher in the present time. As Og said that he couldn't complain, it simply means that he was somehow satisfied with what happened despite the fact that he would have been delighted if he could get all his 15 bitcoins.
But with this story that they have seen and the guy successfully able to recover his, I guess many will start to know the process and will pay any share they'll be asked for as long as they get anything from what they officially have left on those exchanges.
I don't think things are going to work the same way for everyone. Him and every other user of that exchange who managed to get their funds back after so many years were probably lucky that the law firm managed to find the wallet and then gain access to it, because in most cases when exchanges shut down, nothing can be found after that, especially in recent times when they know how to handle all these things properly before closing down.