Yes, water fed pole is without question a great tool, but what about work where it can't be used? It may be all fab on the domestic front but on the industrial/commercial scene, it ain't.
In town centres, there are lots of buildings where there are shops on the ground with offices above. These shops don't want water gushing on/in to their neon signs, stands or entrances etc.
What about work where water on the floor is a health & Safety style "fate worse than death" because of the slipping lawyers 4 U brigade? We have a lot of blocks where wfp is not allowed because of public footpaths on one or more sides. You can't sue the rain but you can sue our clients or us!
Also, it can never do insides, which nearly all commercial jobs have done. It's not very good on initial or traffic caked 6+ monthly cleans. It's a waste of time on crappy old, dusting paintwork, fried on bird poo and just certain types of glass and glass in certain locations.
Ladders will always be needed, trad will always be needed and "real" trad (ammo-swab, leather and scrim
) will always be needed.
Personally, I like a good work out on the ladders now and then. Maybe those who keep falling off the bloody things should try a different profession instead of "John Prescotting" us real window cleaners who are skilled in and embrace ALL methods.