A related issue: Some random old, normal symbols are, for some reason, nowadays displayed by many fonts as emojis, i.e. as colored pictures. For example, the "left right arrow" symbol, commonly used in formal logic for "if and only if", now often appears white with a blue background: ↔. While others have been left untouched, like "left arrow": →. This is so annoying if you actually need that symbol in a logical context! Basically, they have made the symbol unusable in many fonts. They should have added a special emoji symbol if they wanted picture arrows...