wordpress and frameworks

[petemurphy]

Hi,

Do any of you develop websites in wordpress ( ie for lots of people not just yourself?)

If so whats your view frameworks?

ie when I search, a lot of people recommend using something like studiopress yet i see loads of websites that just use any old bought template.

is a framework necessary / favourable for developing multiple sites?

eg studiopress fans say it gives you better security seo etc but cant this be achieved using templates and plugins etc?

is the parent / child way forward the way to go or will templates / built from scratch suffice?

thanks