>>14169098tbqh the > symbol has been universally used as a quote mark everywhere on the internet
like still some email clients quote your repliant text when you write an answer with that character
in most modern applications > symbol has been replaced by a graphical sign that looks similar to | in programs such as slack and ms outlook however you still press > to trigger the quote function
but yeah due to normies stealing 4chan's memes for so long on other websites they unironically started using > for quoting others like le ebin 4channel memers
some of my coworkers even started calling it "the slack greentext"
YIKES