Fair enough, although, 100 years, for most of human history, isn't really all that long for massive technological changes.
The changes would be less pronounced than in modern times but even when you look at early medieval times things change in 100 years, especially, but not limited to, warefare and weapons.
Also its not only about technological changes but also social or political ones. In 100 years you probably had at least one if not several wars no matter where you lived and borders were redrawn. Quite likely some country ceased to exist and several others were founded.