I think it is mostly a trade off. Using modern design philosophy you won't risk getting a really terrible UI but the trade off is you will not get something ne

I think it is mostly a trade off. Using modern design philosophy you won't risk getting a really terrible UI but the trade off is you will not get something new and innovative. I am sure there are all kinds of issues with the scale of complexity also. It would seem nearly impossible for a designer to come up with a good innovative UI if they are not an expert in using the system themselves so the chicken in a farm ends up being the least bad option.