I'm trying to advise a neighbor who is a person of size about buying two adjacent seats, and wanted to verify the rather old information here. He has no status so would be sitting in E-. Route is SFO-ORD, so equipment would be an Airbus, 757, or possibly domestic 767. Is it correct that in E- (therefore not bulkhead, not exit row), all armrests do fold up more or less flush, so we would have twice the seat width available?