Yes there is definitely a niche. Not saying you can charge over the odds on every property to revert back to cleaning windows traditionally but there are instances which crop up.
The most recent for us was a large out in the sticks pad, managed by an estate management company. We've been doing this place for 3 years, never a complaint. They called me up after the last clean voicing concern about the method cleaning, condition of the frames and could we revert to cleaning the windows traditionally and dispense with the pole.
My response was patient and I considered their request. I then told them the cost would be twice what it was with the pole to which they agreed. So a £140 job will now a £280 job, probably done in 3 hours. I'm not complaining.