Or it's because HN's commenting system is a trash fire and whoever coded it decided they couldn't be arsed to implement escapes, quotes, lists or fucking tables but just had to strip out arbitrary symbols and obviously U+2495 NUMBER FOURTEEN FULL STOP (⒕) is important but god forbid anybody use U+262C "ADI SHAKTI" (<should be here but HN strips it out, see https://en.wikipedia.org/wiki/Khanda_(Sikh_symbol) >) or even better U+2299 "CIRCLED DOT OPERATOR" (⊙) makes the cut but U+2609 "SUN" (<also a dot inside a circle just a different one>) shall be banned from using or discussing.
I knew HN stripped symbols pretty arbitrarily, I just checked a few non-letter Unicode blocks (Enclosed Alphanumerics[0], Mathematical Operators[1], Misc Symbols[2]) and checked which one HN strips.
Or it's because HN's commenting system is a trash fire and whoever coded it decided they couldn't be arsed to implement escapes, quotes, lists or fucking tables but just had to strip out arbitrary symbols and obviously U+2495 NUMBER FOURTEEN FULL STOP (⒕) is important but god forbid anybody use U+262C "ADI SHAKTI" (<should be here but HN strips it out, see https://en.wikipedia.org/wiki/Khanda_(Sikh_symbol) >) or even better U+2299 "CIRCLED DOT OPERATOR" (⊙) makes the cut but U+2609 "SUN" (<also a dot inside a circle just a different one>) shall be banned from using or discussing.