Eh, I dunno, there’s a free chat app lifecycle that they all pretty predictably go through and Discord is getting a bit long in the tooth.
WRT the stickiness, I just use Discord as a site to chat with my friends. Based on other comments, some folks use it as more like a social-media site. So, maybe I just don’t see the roots. If it is more like a social media site, it might survive in that lingering state that sites like Facebook have.