The concept of Fantasy Gun Control is a pretty familiar one: for various reasons, stories set in a typical medieval fantasy setting generally don't have guns or people fighting with guns. But if your fantasy world isn't going to stay at a medieval level forever, eventually technological progress will occur.
The Gods of Mundus don't really have anything against technology, but they have a serious problem with using it to make it easy to kill lots of people very quickly. Therefore, they've issued "Thou Shalt Not"-level prohibitions against the development of gunpowder and other dangerously explosive substances, and they really mean it: try to build stuff like that and you're likely to get yourself and your (highly explosive) research struck by lightning or other expressions of divine wrath. (It goes without saying that nukes are right out!)
As time goes on, how much is this prohibition going to hold things back? Obviously with no knowledge of explosives you can't build rockets and visit the moons or launch satellites, but it seems to me that it would be perfectly possible to build most of modern technology, including satellites, long-distance communication including both broadcasting and networks, skyscrapers, and electronics, vaccines, pharmaceuticals and antibiotics, all without any knowledge of gunpowder or explosives. But I could be missing something.
What non-obvious developments in technology would be cut off by a strongly-enforced blanket ban on explosives?