it has no more of an effect than old raids have ever had. nobody said there had to be any challenge in outdated content. you dont have to bring ANYBODY along. thats the nature of "soloing old raids". and as to your worry about gold? do you not notice how gold drops are constantly nerfed in older dungeons/raids? as soon as anybody tries to make gold from them Blizzard steps in and nerfs it, they will continue to do so. these worries are minor concerns at best.