What happened to Mordor?

[Eönwë]

Originally Posted by Morthoron

warfare does not advance along technological lines (like the absence of plate armor and the use of gunpowder only after 3 full Ages of Middle-earth history). The interminable stasis over many millenia for me seems rather unbelievable (and for a fantasy, suspension of disbelief is paramount).

How long did it take us humans to invent gunpowder?

But yes, that is good point. In fact, technology seems to have gone downhill (though in the early middle ages that did happen too).