experts say charging could become an important source of income
No doubt that part of the new income is the government issuing more carbon credits to Tesla (not just for making EVs, but providing charging for more EVs). Those are fake credits that Tesla can sell to oil refineries cheaper than the refineries pay carbon taxes (the RIN's that refineries have to pay).
I can't stand that mess, and I'm an EV owner.
The slow charging issue appears to be related to the type of battery technology in the car. Teslas are 400 volt while others are 800v. According to the article 800V cars are throttled to about 50kwh. Cars that have 400V architecture don’t have the issue..