[pwdisswordfishy]

A coding font is supposed to help you distinguish between characters, not confuse them for each other. Also, ASCII ligatures usually look worse than the proper Unicode character they are supposed to emulate. The often indecisive form they take (glyphs rearranged to resemble a different character, but still composed of original glyph shapes; weird proportions and spacing due to the font maintaining the column width of the separate ASCII code points) creates a strong uncanny valley effect. I wouldn't mind having "≤", "≠" or "⇒" tokens in my source code, but half-measures just don't cut it.