I think the "safety issue" portion of this is a red herring, and not relevant. From everything I have seen the MCU fails before you get in and start driving, not while you are actually driving. So if you decide to drive you are making a conscious decision that you think it is safe enough to drive without those features being available. Also the back-up camera angle likely isn't going to fly since backup cameras weren't required when MCU1 cars were manufactured.
So that leaves other issues like HVAC controls. I have seen many cars, ex. Ford, where the HVAC modules are prone to fail out of warranty and prevent proper HVAC operation. Yet there have been no recalls for them that I have seen.
This is more similar to transmission and radiator issues that other OEMS, ex. Nissan and Mercedes, have had. If I recall correctly Nissan offered an extended warranty of a few years for the particular issue while Mercedes just said too bad, that'll be $4,000+ to fix. Someone filed a class action suit against Mercedes but it was thrown out. ("In dismissing the case, the judge ruled the plaintiff can't prove Mercedes committed fraud simply by showing some vehicles had radiators that eventually had problems.")
I think the difference here is that it appears that there will be a 100% failure rate of the MCU; most often right before, or after, the warranty period ends. (Maybe different for CPO/used cars that came with extended warranties.)
If Tesla has learned from this they will have made changes to make the MCU last longer. For example by reducing logging, which we have confirmation they have done. They could also put a bigger, or higher quality part in, which I have seen rumor of them doing in recent remanufactured MCUs.
I think the most likely outcome is that Tesla offers an extra 4-year warranty on the MCU, a total of 8-years from manufacture. (And hopefully putting better parts in going forward.) I don't expect an actual recall, since this isn't likely an issue that puts you in danger while you are driving. (Not that there should be a recall for everything that can fail putting you in danger while you are driving.)