The same world that produced the USDA Expenditures on Children by Families Consumer Expenditure Survey results, in which that amount is similar to other numbers. The US government may or may not have artificially inflated these numbers for intrinsic benefits. Depending on how you slice the numbers or what variables in that child’s life are at play, a child can easily cost more than $2700 a month, but millions of families also raise multiple children simultaneously on less money than that. In the same world where rent prices on 1-2 bedroom places can start upwards from $1500/month, what values do make sense? The answer to that depends on whether we’re talking about Musk or actual people.
Did he upgrade the head and handle? If so, it’s still your grandpa’s axe. Did you upgrade the axe? It might now be an axe of your own making. If “same” is extended not just to refer to the materials, but refers to fourth-dimensional quantum axe states, the axe stops being your grandpas axe the moment your grandpa isn’t chopping with it, but becomes his axe any time he returns to use it.