I do think there may be something to this. With so many relays and motors on the 200-series, that are inductive loads...
Low voltage from a battery in low states of charge (SOC) has a big consequence. Electronics, relays, and contacts are generally rated and sized more for amps.
With inductive loads, they will pull power however they can get it. If voltage is sagging, they'll pull more amps, often much more amps. If the battery is sagging 30% voltage, it'll make it up in current. It's current/amps that really creates heat and wear on electronics and contacts. I do think part of starter failures, fuel pump, hatch motor, etc, is a consequence of early demise due to weak batteries.
Long way to say a larger group 31 may create more longevity as there's more reserve and power to keep voltages generally higher for the same use.
Another way to say if you have a weak battery, don't wait to change it.