That's probably not that big a deal. I can count the number of times I've used a public slow charger in my last 4 years of EV ownership on one hand. Slow charging basically only makes sense at home, where you're leaving your car charging overnight (where you'll obviously have your own car's charging cable).

Out and about, it makes a lot more sense to use a DC fast charger, where having a port that will fit the charging stations matters a lot more.