FWIW, a friend chopped the rear triangle out of an old MTB he has, and it wobbled so badly, it was scrap metal after! Wouldn't fancy splashing out with it not even there in the first place!

Even some of the fanciest custom frames built, tend to always have a rear bridge, think there's a reason! Obviously a new comer could see them as irrelevant, not having years of experience in knowing what's important to the over all performance of the frame..