I also have a 2018 Clarity with 78k miles on it. It has about 44 miles of range usually and the battery capacity shows 45.74 Ah. Degradation has slowed to a crawl over the last couple of years, so it will probably take a cell failure to kill the car's battery. As to when that would occur, I'd bet on average life of the pack being about 12-15 years (given it still seems healthy at 8+ years), so odds are that it will occur for me in the next 4 years or so. I'm still planning on driving mine for now at least another couple of years or until the battery fails. As to what is available as a PHEV/EREV replacement, a possibility is the upcoming 2027 Hyundai Sante Fe extended range EV. It is being touted with a potential 600 mile total range and probably approaching 100 miles EV range (that's a guess from what I've read, no actual specs have yet been released). Apparently, Genesis may release at least one EREV, but I haven't read anything about the potential range.