Are you talkin nice bike or rain bike?
Nice bikes that ride on paved surfaces in dry weather get their 9spd/10spd chains lubed about every 100 miles and cleaned about every 300 - 400 miles
Rain bikes that ride in crap weather and on crushed gravel/dirt paths get their 5spd/6spd chains lubed about every other ride and cleaned a couple of times a year.
Good maintenance generally equals longer wear and less problematic drivetrains.
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Vintage, modern, e-road. It is a big cycling universe.