The shorter your range the more important fast charge is. My car with a 200 mile range is almost(!) always fine on level 1 since I so rarely use make so many trips in a row that it would empty the battery. My wife’s phev with only 30 miles of range is always at near 0% when she gets home and she (like most people) is likley to be making another trip soon so level 2 is a must. (of course it could switch to gas it isn’t charged, but gas is several times more expensive so we try to use gas for long trips only)