Anyone who thinks it's a bad thing that Tesla will likely make SuperCharging an option, rather than a standard feature in the Model 3 is very wrong. My bet is all Model 3 will come with the tech built in, and anyone who buys a Model 3 will have the ability to pay for the Supercharger upgrade if they decide they need it. Additionally, I think Tesla said the base model will be ~60kwh, and will have ~250 miles of range, meaning Tesla has significantly improved the battery chemistry and range, meaning Supercharging shouldn't be necessary for a significant number of Model 3 buyers.
I'll also remind you that some Model S did come with the hardware for Supercharging, but required a paid upgrade to use it.