"why does software require maintenance, it's not like it wears down"
Because software is not generally useful for any inherent good; what matters is its relationship with the surrounding context, and that context is in perpetual change.
ANNUAL NLCD
THIS IS NOT A DRILL
https://www.usgs.gov/centers/eros/science/annual-national-land-cover-database
Land cover is foundational information for land managers, scientists, and the general public. Many types of scientific studies have applied annual land cover information including estimating biological carbon emissions, projecting future land use, tracking urban development and heat island effects, documenting forest fragmentation or conservation practices, modeling wildfire hazards, tracking water quality and quantity, and understanding change in wildlife habitat and ecosystem disturbance/disease.
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