Edge doesn't have everything. It lacks FM radio. It it still important for some folks.
Both of them are beautiful and strong phones, and I would say the best of MWC 2016 and both wins, but it depends on user needs which one to pick up.
That first comment is a bit harsh!
LG (bless em) are trying something new. Innovation is always good I saw.
In this particular case I don't see much point of the add-on accessories they've produced with the phone - bUT that doesn't mean third party alternatives won't be coming further down the line.
Personally I'd prefer an alrounder phone that doesn't need add ons. I just can't see myself rebooting so often. But they certainly could become useful for some people. For example - someone could develop a mini projector add-on or huge stereo speakers.
Jeez - I should work for LG R&D!!
Well done to them both I say
(but my personal preference would be the S7 Edge)