The linked article…

The weight of the motor is insignificant compared to that of the batteries.

I turned down an interest only ARM loan in favor of a traditional mortgage a couple years before the subprime mortgage crisis… Wells Fargo was trying to sell me on the loan with “real estate always goes up”, but I had to ask, “and what if it doesn’t?” He looked at me like I had a 3rd arm…

I like saying “anything can happen if you don’t know how anything works”

It’s a little more general.