Amphibious LSAs are like a cold ice cream cone on a hot summer day: Nobody really needs one, but once you’ve had a taste, you really, really want one.
But practicality is a matter of perspective. Having the option to drop in on a lake or river and pull up to the local fish shack for lunch makes for some serious recreation. Having the option to use most any airport for, hangaring, refueling or maintenance is seriously convenient.