Bob, it’s a necessary part of the package for “most” users.
The problem with high-capacity battery systems is that they take a lot of energy to recharge, and to do it in a reasonable amount of time, a second alternator is probably best solution for now.
Solar is way too slow for a van, and a single OEM alternator would take most of the day driving to recharge 600 Ah. For a few like me that may be OK though because we drive/tour a lot.
Also, for owners who stay in campgrounds, they can recharge at night from shore power. That’s why I mentioned liking a la carte pricing.
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