That strategy make sense if you're goal is longevity for your first battery units. But with most early-adopter, often the attitude is to know you'll be upgradin

That strategy make sense if you're goal is longevity for your first battery units. But with most early-adopter, often the attitude is to know you'll be upgrading somewhat frequently (3-5 years) due to rapid advances in the tech, until more advanced offerings come around that could least 10-20 years.