My guess is that 95% or more of all Discord users do not care and simply upload their selfie or ID card and be done with it. I know I will (although they did say that they expect 80%+ to not require verification since they can somehow infer their age from other parameters)
I've already cancelled my Nitro account. I'm quite active on a ~5k member programming server and we're giving Zulip another try. I think it's unlikely we'll stay on Discord.
Obviously anecdotal, but eventually this adds up.
This whole thing being "for the safety of kids" is obviously a farce just to get more user data because Nitro users supposedly will have to do the ID check as well, but if you're paying with a CC/Paypal, you are obviously of sufficient age to not require an ID check.
Are you a minority, LGBTQ+, etc or of a "different" political persuasion that might have any reason to be distrustful of the US government? If so, you probably wouldn't just "be done with it".