I agree with
@lolachampcar.
It is certainly frustrating that most other performance brands offer factory options for bigger, carbon/ceramic brakes and so forth - Tesla gives you no choice at all. Really, not choice beyond the color, but I digress. The Taycan is not as fast or powerful as the Plaid, and yet even its standard, base model brakes are much bigger. It just reaffirms to me that Tesla is too focused on only acceleration and software, not the rest of the package.
But to that point, 98% of their user base just drives the speed limit to work and back. They will almost never need such powerful braking systems, because they'll just be driving in traffic. And for that, smaller steel brakes are fine, and they'll have plenty of time to cool off with 'adequate' stopping power for that one time you get cut off per day.
I guess the takeaway is - If you are going to be tracking your plaid, then you should probably invest in a big brake kit. If you're just daily driving around the city, you're likely fine with what you have, even if it does leave a bit to be desired versus the performance competitors.