Our Grandfathers Clive, never had the restrictions of H&S, so the problem never reared its head, out came the ladders.
The problem we all have is the different gaps between the tiles and the gutter edge, I remember one Job I did were, I could just get two fingers in, so even my own or Alex's scoop would be next to useless on this type of Job, I think with all of todays technology, if there was anything out there to do a good Job on all types of guttering, someone would have come up with it by now, (I think) but like you say there is one Caractacus Potts out there that's going to produce something so simple we'll all be shocked.