Ok, 4ed, which is, yes, why the releases or going all soggy, is not relevant.
2nd ed fluff, that is relevant?
But since its come up, its true tsr was releasing that, er, stuff from the start of 2ed, sadly. And would put big dollops of it in books that otherwise might have some good crunch. (As an aside, I don't have a problem with good fluff, but sometimes with so much bad you just can't find the good).
Back to WotC. This is a change of behaviour for them and it is exactly what should happen before a new edition. I am just giving them the benefit of the doubt.