Very interesting thread, inciting some passionate replies!
My thoughts are that, wanting to keep life very simple, I have been and always will be a trad window cleaner for as long as I am capable of carrying and climbing a ladder safely. I have nearly 15 years of experience in this game, never charge about in a mindless hurry to earn the next buck quickly, and am very, very thorough in everything I do.
Were I to convert to WFP, I know that it would do my head in. I would be asking myself and stressing out over such questions as 'Have I got enough water on board, is the TDS 000 (anymore and I would be worried about spotting) have I got spare pumps, etc for when they break...' etc etc.
What I love about trad is its simplicity. I earn enough, it is stress free and I answer to nobody. If I am happy why try to fix something which ain't broke?
John