No, you are missing the point. Are you past the 8-year/100k mile extended warranty? Because that should apply even to your replaced MCU. (So if you have a 2016 with 50k miles you have another 4-years/50k of coverage for the eMMC issue.)
Well, if they were an honorable company that may be the case, but they will likely consider the replacement as a replacement part thus all the "rights" as a replacement part are in effect nullifying the 8 year warranty on the original part and replacing with the one year replacement part warranty. Hopefully I get my $2000 back and the point is moot, but doubt it given past history on in warranty and out of warranty issues
What you have to understand is that tesla wildly underestimated repair/complaint rates and did not plan infrastructure and reserves for warranty repair. Service for me at first (2017) was excellent and deteriorated rapidly thru 2018/19 with the intro of the model 3, finally NON-EXISTENT when warranty expired. I used to be able to cajole service manager at my favorite SC but turnover became rampant and any employee not willing to tell customers everything was "in Spec" or "couldnt replicate complaint" was fired or got so miserable lying to customers they left.