Yes, I agree, I think 9 - 10 model memories are probably adequate. Back when we had to actually build what we flew, 4 would have been good. However, with ARFs, I am on my 4th model this year, since April, 2005.

Going from model to model in a computer radio is far easier than having to make adjustments and flip servo reverse switches to operate another model. It is far safer, also! I suppose it is really only a matter of conveiniance

However, we all do what we have to to make all this work for us and if your happy and safe doing it the way you are, great! I had to make due with this option in the eighties, so I understand how it works.