IC = instrument cluster, the thing behind the steering wheel
MCUx, console = screen in the center of the car
The old IC had a puffy bright trim metal around it. Circa 2013.
Circa 2014 onward, the trim got thin. The LCD resolution of the IC got better.
I'm not aware of bubbles ever on IC, only on the center console.
Or yellowing edges, also a center console thing.
I'm not aware of any retro fit being offered by Tesla to put newer IC in place of old. Maybe as a used DIY thing, it's possible.
But I have heard promise of MCU2 retro replacing MCU1 as a Tesla Elon promise. Yet to materialize. And probably never. Maybe as a DIY somebody has done it.
Are we mixing issues in this thread?