Some jobs can be right pigs to do so ladder are still needed for sure on some jobs also can be quicker to handball sods out or unblock downspout bends by hand. That's if you can set the ladder safely but still a guttervac is an esential bit of kit to have too when ladders can't be used at all due to access issues.
The use of a gopro set up as a gutter cam for surveys whilst giving a quote in my opinion is to really establish best methods to be used instead of getting ladders of the van to have a good look so you know for sure exactly what you are going to be up against. Just clamp the gopro onto the end of a stripped down water fed pole, hit the record button and wiz around the property which takes only mins to do. If you have an lcd touch screen backpak the vid can be played back directly from the camera instead of faffing about with a wifi connected smart phone or tablet.