It is never irrelevant. If electricity is .50/kWh USD - then refueling an 90 kWh with 100+ kWh (charging losses) from the grid is $50 USD. It is a factor. Depending on the driving needs of the guy in the Mercedes S @ $8.00 - are they factoring in whether the costs are eaten by their employer and is it a leased vehicle like we have in the USA? Are employers in S. Korea going to go "gung ho" (sorry, wrong country) and get employees into EVs? Are they doing it now and is there already market growth visibility?
I want to see how Korea does with the likes of the Soul EV and the take-rate among private buyers. Japan has a ton of CHAdeMO chargers out there but what is the Tesla current sales rates in Japan? Nissan has sold a lot of consumer level Nissan Leafs there. What will the Leaf 2.0 look like price-wise in Japan versus an imported Model 3? Lots of questions...
They do have this going for them:
Seoul, South Korea Offers Up To $24,825 In Electric Car Incentives
EV Sales: South Korea
Looks like Tesla could sell 100+ S + X per month there in S. Korea. Maybe they have already shipped initial lots of cars to the country?