I looked at those as well, but the ICCU issues were enough to deter me. I do a fair amount of highway driving and the thought of suddenly dropping from highway speeds to 12 MPH was somewhat chilling.
As an owner of a used EV6, I can tell you this issue has caused some concern and I do think it's a real but rare issue.
However, my calculation is this: It's a 1% impacted issue. Replacing with an AGM battery drastically reduces the issues. Recalls somewhat mitigate this issue further. Apparently reducing your L2 charging rate to < 7kW also reduces this. At the end if you are still unlucky, the ICCU is almost always covered by warranty but replacement is annoying and can take months.
To mitigate I plan to replace my stock 12V with AGM, and buy a portable battery starter.
I think that's solved by a recall, so if the car you're looking at is either new or has already had the 12V battery serviced, it should not be an issue.
When I looked into it, people who had the recall performed had it happen again. This made me suspect that they were trying to correct a hardware problem with software, or that the software was somehow able to damage the hardware if it wasn't updated in time.
That was on the EV6, though, but they share the same eGMP platform.
Mine's in today, Reddit has reports of people being told as late as March. Hyundai Finance is working with customers who cannot get the fix in the near term
2025 Ioniq 5s have the NACS port (only in NA markets, obviously). I don't think the 2025 Ioniq 6s do, though they probably will for the next model year. Like you said, CCS-equipped cars can use the Tesla network with a NACS-to-CCS adapter.
