for those that dont or cant then fair play to ya if you can make a living window cleaning all year round without using traditional tools.
i for one couldnt envisage just using WFP.i find trad quite enjoyable at times(mainly ground floor windows)esp if the space is tight and/or the windows are wooden.also in winter i tend to trad more due to the water freezing on the ground.
it breaks the day up and with a bottle on a belt i can easily swap from wfp to trad very quickly.i save water too.
some jobs are just as quick if not quicker using the trad tools plus some windows just dont come up good no matter what you do with the pole!
i like to be adaptable.id say 80% of my work is WFP.nice to keep the trad skills going though as well!
regards
dazmond