This is a bit of a nitpick, but L2s don’t charge slowly. Ours gets us about 30 miles per hour, so we get fully charged after a normal day’s worth of driving in about 30 minutes.
It depends on your definition of "slow" and your use case. If you were on a road trip and had to stop for an hour per 30 miles at a charging station, it'd probably seem really slow. If you're plugging in after you get home from a short commute (the most common use case), then it's perfectly fine.
For sure, but we’re talking in the context of a home charger here.