Good sense is avoiding a 30 minute detour. Google maps says right now that Kennewick SC adds 25-30 minutes round trip to the highway.
Detour? The route goes right by Kennewick anyway! I cannot take you seriously if you're going to do this. Sure, it does work out to 16 minutes off the highway (total time 2:57 instead of 2:41) and maybe 10 minutes for the charging time, but you wouldn't need to do this in both directions. Charging once either on the way there or the way back covers it, so it's not 25 minutes each way.
The Kennewick SC isn't convenient. Adding 30 minutes to each trip just so that you can skip a supercharger that ... does in fact exist is silly.
Wait. You think
we are the ones suggesting skipping a Supercharger? Now the word silly is applicable. That's not what happened. This moving of the goalposts is getting hard to keep up with. You said:
Imagine you drive from Ellensburg to Walla Walla (happy?) [...]The last time I tried to make a round trip from Ellensburg to Walla Walla and back I arrived with 5 miles of range
You were talking about starting from Ellensburg, and doing a round trip to Walla Walla and back with no charging. We're just suggesting using a Supercharger somewhere along the way, and Kennewick is
the one along that route. So the Ellensburg Supercharger wouldn't have entered into it anyway, since it's only the start and end point, not anywhere along the round trip you were proposing.