I have been wondering: is it even possible for a platform to fulfill both needs?
For searchable, "forum style" discussions, we already have a large accessible platform: Reddit! I genuinely ask myself: why is "Join our Discord" much more popular than "Join our Reddit"?
I personally prefer "forum style" discussion over "IRC style" discussions, but the polularity of Discord even in technical circles proves to me that a lot of people like the IRC style of communication.