Ok the source of WinUAE is in a bad way, but it works and that is by far the most important thing. It is how I work when I am writing any code.
1) Make it work no matter what
2) Optimise it for maximum speed
I personally think that WinUAE is an excellent program that deserves our support, not ridicule.
Of course people can put their brains where their gobs are and download the source to make it better.