But any prominent app will be pressured to have ID verification in the end, no? Also, Discord's roots are very heavy, people are too invested with historical data and etc. I don't even see an alternative to it right now.

WRT the verification, it is a symptom of the fact that Discord is entering the monetization phase. So, I don’t think it will be the thing that causes people to leave. It is just an interesting road mark along the way.

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.