Is this not just about extra credit? So what's included in the subscription doesn't change - just extra credits are now token based instead of message based? (For Plus/Pro)
Yes.
> This format replaces average per-message estimates with a direct mapping between token usage and credits.
It's to replace the opaque, per-message calculation, not the subscription plan.
God every single title I read about AI on this site ends up being a straight up lie.