Well, one key difference is that 800V/lower-amps fast charging at DC chargers is one of the major advantages of the E-GMP platform Hyundai uses…10-80% under 20 minutes on an 800V charger.
But on a 400V system like Tesla, those low amps mean especially slow charging. So this guts the specific buying point that made the car special, if Tesla stays at 400V, and severely devalues it. It’ll charge like the famously awful Chevy Bolt.
CHAdeMO has been on its way out long enough that I assume anyone with a Leaf still on the road knew what they were getting into when they bought it. You buy that car to charge at home or work. The Ioniq 5 was supposed to be road trip capable.