Not to mention, it’s a standard now, and the old Supercharger protocol is being phased out in favor of another standardized one (I forget which). Further development done on their chargers from here on out is going to be done by a consortium of companies rather than in-house anyway.
My first thought is that this is meant for custom upholstery. If you’re spending $1800 on a single chair, you’re probably willing to shell out another grand or whatever to cover it in fabric that you like.