Canon's 10x42 L IS WP binoculars are premium stabilized optics used for birding, marine use, and handheld astronomy. The optical elements can last a long time if protected, but stabilization adds complexity: the IS module, gyro sensors, and internal control electronics are common high-cost failure points.
Battery contact corrosion and compartment wear are also common in outdoor environments. Repairs make sense when the core optics are pristine and the issue is isolated-like a battery contact repair or eyecup/diopter service-because the optical quality is the main value.
Replacement becomes more reasonable if stabilization performance degrades due to internal module failure, if the unit has significant water intrusion, or if prism alignment is off after an impact (which can be difficult and expensive to correct). For stabilized optics, careful storage and avoiding drops are key to long-term value.