Windows 8 Metro UI and its flat glyph-inspired iconset (similar to minimalist signage, e.g in EU traffic signs) was such a disaster that 8.1, that soon followed

Windows 8 Metro UI and its flat glyph-inspired iconset (similar to minimalist signage, e.g in EU traffic signs) was such a disaster that 8.1, that soon followed, allowed options to toggle between Metro (for those who preferred) and the classic Windows 7 look & icons. It was called Legacy UI in their options.