Similar experience here. 2 years on each version average 5 days per week rain or shine. Later version has better fit, more rafined and great durability. Might need replacement in a month or 2.
Wilder rides get burlier Dakine Hellion or IXS Cleaver when going full savage. All great pads in their category.
Enduro Knee seems like a good replacement for both when the time comes.