It is, definitely. We own our home and leave it on the level 1 charger all the time. It gets us around the metro just fine, no long commutes so it’s great for us. And as someone mentioned somewhere around here, a longer charge time isn’t necessarily bad if you’re the only driver on long trips. I’m honestly more worried about having to stop in areas with only a couple chargers (Midwest here) and some asshole vandalizing them and leaving me stranded. But that’s a concern that pops up once or twice a year at best. And the various charger apps are pretty good a letting you know they’re down.
They shouldn’t be plotted that way technically. The big 5 are independent traits so they should essentially be sliders, not linked like that.
That said, it’s way easier to see the points when you do that. Easy to miss when colors swap, for example, without the lines when you’ve been looking at this stuff for a few hours.