Low-maintenance to me means using quality components.
I built a steel road frame (Curtlo) up flat-bat style with Dura Ace and XT components (and SRAM Force brakes, don't like Shimano brakes).
Riding weight is 23 lbs (w/ lights, pump, Brooks Flyer saddle and saddle bag with tools) but as a road frame it's plenty fast and it rarely needs attention...
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Today, I believe my jurisdiction ends here...