The longevity of replacement brake pads primarily hinges on various factors. Replacement brake pads, when properly cared for and under typical driving conditions, are anticipated to last anywhere between 30,000 to 70,000 miles. Nevertheless, individual experiences may diverge from this average range. 

The type of replacement brake pads you opt for can significantly impact their durability. Ceramic replacement brake pads, known for their extended lifespan compared to other types like organic pads, might be a preferred choice. Driving habits also play a crucial role in replacement brake pad wear. Aggressive driving, such as sudden and forceful braking, could accelerate the deterioration of replacement brake pads. 

Replacement brake pad longevity can also be influenced by the terrain you frequent. In hilly regions or areas with steep descents, replacement brake pads might undergo more stress, potentially reducing their service life. Moreover, the weight of your vehicle is a factor to consider. Heavier vehicles tend to wear out replacement brake pads faster due to the increased braking force required. 

City and highway driving present differing wear patterns for replacement brake pads. Urban driving with its frequent stops and starts can lead to faster deterioration compared to highway cruising. Proper maintenance practices further enhance replacement brake pad life. Regular inspections and timely adjustments can go a long way in preserving their effectiveness. 

Choosing high-quality replacement brake pads is a prudent investment. Although the initial cost might be higher, their extended lifespan can yield long-term benefits. Environmental factors also contribute to wear. Replacement brake pads might deteriorate faster in wet or humid conditions due to increased corrosion risks. 

In conclusion, the lifespan of replacement brake pads varies depending on multiple factors. From the type of replacement brake pads to driving habits, each element interplays to determine their durability. Regular maintenance, quality pads, and attentive driving can collectively contribute to maximizing the lifespan of replacement brake pads.