If Bethesda are remastering Oblivion and Fallout 3, why not Morrowind?

According to leaked documents, Microsoft are/were remastering Oblivion and Fallout 3. This is boring. The past decade of innumerable remasters has been boring enough, but remastering these two games is particularly boring. When even bother when all Bethesda have made since Oblivion is Oblivion remakes with added spacesuits or yelling? Boring. But while I think the torrent of remasters is a miserable sign of big publishers just giving up, if they're going to do it anyway: why not Morrowind?