chocolatemalt writes:

Perhaps
with superconducting transmission lines someday (assuming it's
achievable), they will no longer care if your PF deviates since their
own energy expenditure will be equal to your real wattage, and reactance
will be irrelevant.

No, there is still an economic penalty to the current capability of the
generation plant being used up for no delivered power. Capital is tied up
without producing power for the customer.

This may be more costly than the line losses today.

It is not much different than the peak demand charges that even small
commerical customers now endure, and which ought to be paid by everyone.
The true cost of electric power is not just fuel and transimission, but the
capital investment for peak capacity.