Discord claims "most users" will never go through an age verification process because they're already monitoring your behavior.

For the majority of adult users, we will be able to confirm your age group using information we already have. We use age prediction to determine, with high confidence, when a user is an adult. This allows many adults to access age-appropriate features without completing an explicit age check.

Gotta say, constant behavior analysis is not the warm and fuzzy blanket they seem to think it is.

https://discord.com/safety/how-discord-is-building-safer-experiences-for-teens

A Safer Discord by Default: New Teen Safety Updates

Discord is rolling out global teen safety updates designed to create age-appropriate experiences by default.

@mttaggart The alternatives we have left if we want to abandon Discord are Matrix (ELement/Fluffychat), XMPP, or Stoat Chat (the latter should be taken with a grain of salt until they open the code and audit it as FOSS).
@limon @mttaggart Do not forget Spacebar! It's FOSS, self hostable, and reimplements the Discord's API so well that Discord bots and the very official Discord client can be patched to work on Spacebar.
https://spacebar.chat
SpacebarChat - Selfhosted, secure communication that you're already familiar with

Spacebar is a free and open source reverse engineering and reimplementation of Discord, including both the backend and frontend. It's a chat platform similar to Slack and Rocket.chat