I’ve had my bikes serviced at seaver’s since we moved here in ’93, and have yet to be offered a loaner, nor have I ever expected one. For a few years I went to brown’s because they provided a loaner. I was always sorry to return their k100 and pick up the old airhead, but eventually for whatever reason, they stopped providing a loaner, so I returned to the more convenient seaver’s who also had seemingly better parts availability for older bikes.
Perhaps a simpler and more businesslike solution would be rental bikes so that those of us without trailers or willing accomplices could ride in and ride out. I doubt either dealer would want to undertake it, but it would make life simpler for the working biker.