This is one of those decisions that feels so utterly dumb that I feel like I must be missing something obvious about the rationale for it.
The only way it makes sense to me is if it's Elon basically continuing the "EV adoption must be prioritised at all costs, including to my own company, existing customers, etc" line of thinking.
In every other way eliminating what is the major USP for their cars, arguably one of the only ones keeping them ahead of certain competitors, just seems insane to me. It'll convert some Model S owners into Taycan owners, and probably a number of potential Model 3 and Y owners to other marques.
Tesla don't have the build quality and service network, etc to compete with manufacturers who can't beat them on the charging side of things.