Steam forums and reddit won't disappear because of discord, don't worry.
This
I stopped using Discord as most of the time it's people rambling nonsense so it's been such a waste of time
Nowadays when I need info on something gaming wise I check here making a topic , YouTube to check to see why I am stuck or on gamefaqs (though cause of YouTube it's less now) .
Rarely do I use reddit other than asking a question or opinion on a game purchase.
I don't use any other social media or source