Imo you are not a window cleaner if you dont have the traditional skills to clean inside windows.
Now im not saying those who choose not to clean inside windows as a business decision are any worse than someone who chooses to clean inside windows.
But personally, there is no real skill needed for wfp operation; its very minimal which is why we now see so many window cleaners.
I do clean inside and outside,. Whatever is required from the customer.
Having trained a couple of guys to wfp there definately is a skill to it.
To go fast and do a good job takes as much practice as it does to get good at trad work.
People talk like trad is much more difficult, its really not... its easy to do at a moderate pace, as is wfp.
Both are easy to learn, but takes a while to master.
The main reason window cleaning is more attractive is not because learning how to use a wfp is easier it more to do with not risking death on ladders. Online payments, no collecting is a big factor as is the increased money to be made wfp. All the latest gear and fancy items, vans, brushes, poles, hot water etc available today also makes it more appealing to the modern chap than mucky old scrims, vests and buckets.
I personally dont like doing insides due to having to make appointments, i hate being in peoples houses sweating and creeping about. But also it ruins my flow, i dont like to be knocked off stride, i like to bash out houses as fast as possible in a fast efficent manner,,. fannying around in someones house would just kill my flow.