Actually, I took steps to ensure that the technology of my world wasn't stagnant. In fact, right now it's on the verge of its renaissance. Technology and other magic, treated as social trends, are vital & evolving things.
Technologic and genetic evolution do not progress at a steady rate. Rather, they erupt in spurts, leap forward, have false starts, fall backward, try new paths, and die to be later redeveloped.
This is not to say that there haven't been stagnant cultures in Midian, but that this is not the case currently. Elves and other Fae, being immortal, aren't going to develop at the same pace as short-lived Humans. Since the best way to advance your ideas isn't to convince your detractors, but outlive them, comparatively few new ideas take hold in a society of immortals. Changes do occur over time, and new ways will develop, but this can take millennia rather than a few short years. Technological and magical growth didn't really pick up among the Fae races until a mutation ooccurredamong a young Goblin child. She was born with a gene for mortality--passed this along to her offspring, grew old, and died. With a new--and mortal--race of HHobgoblinsmucking things up, things began changing at a greatly increased pace among the immortals. Unfortunately for them and the world at large, this new pace wasn't nearly as quick as the development speed of the Hobgoblins.
Among the other sentient species of Midian, they were pre-civilised, and some even pre-sentient at this stage. Dwarves were discovered by the Hobgoblins and quickly enslaved. Orcks and Ogres were a single primitive species, about as developed as chimpanzees. Firps were non-sentient. And no one considered the Trolls as anything other than "monsters," sometimes even other races of Trolls. Humans had not yet arrived, and the Killian were only recently so. The Killian at the time had voluntarily given up an incredible amount of technology for religious reasons.
This is all about 4000 years ago in the game world. As technology's rate of development is directly connected to how quickly information can be exchanged, this situation doesn't change readily. Consider the changes in the Meat World between 3500 BCE and 200 CE--it took that long to go from the invention of the wheel to the invention of the wheelbarrow. Another sad fact of technological and cultural development seen throughout history is that aggressive "barbaric" cultures destroy more advanced and peaceable ones with frightening regularity and ease. In Midian, this meant that the Dwarves, who had only recently began forging iron, were reduced back to the stone-age level of the Hobgoblins (bronze casting was developed shortly prior by Kobold mages and kept a closely guarded secret). The violent and aaggressivenature of the Hobgoblins' Olde Empire and its policies was not conducive to the development of new technologies at all. The only technology that they approved of was those that aided in battle, and then only if the inventor was of the warrior caste--herder caste Hobgoblins weren't supposed to even be thinking about weaponry, much less developing new ones. Magical development was right out for the Olde Empire; the Hobgoblins didn't trust it. This placed the further development of the mystical arts almost exclusively in the Elves' four-fingered hands.
Humans eventually arrive, and do what Humans do best: kill, breed, destroy, and aaccumulatemore and more stuff. Humanity was quickly reduced to barbarism, and had to re-invent much. Over the next two millennia, Humans obliterated the Hobgoblins' Old Empire, and founded their own nations. Human technology developed during this time, stunning the Empire's soldiers with horrific tools of war, such as the bow, armour, and horse riding. Humans were also aided magically, thanks to the Elves greatly contributing to the Human's growing body of magical arts, but the Humans then rapidly developed new ideas of their own. These included such strange new magics as necromancy, neithermancy, technomancy, and other previously unknown magics.
The world does not stay static and unchanging. The game world continues to grow and develop internally. New technology, new types of magic, new political, economic, and social changes change the world and its inhabitants.
The printing press is a recent invention, and only time will tell what effects that will have. New refinements of the arts of killing and sorcery are under development. Trade routes are now readily open between all three continents. Enterprising entrepreneurs are linking divers financial institutions. Formour has a network of linked messengers. Changes in navigation techniques are making ocean voyages quicker and safer. Large armies of heavily armoured soldiers are becoming less feasible and popular, while small groups of light and highly skilled experts can achieve much of the same goals more cost-effectively. Pride, curiosity, lust, and greed continue to mold the world of Midian in its present and future as it has in its past.