Ask a teenager what a folder is. There's a good chance they'll not know what you are talking about. They can use apps and that's about it. Thunderbird? Good luck with that.

I hear you. It's about incentives. Any time a teenager can learn a method to get around content restrictions will will become a tool in their toolbox. They might reach for the Discord tool by default but when that is compromised such as recent events and governments start looking into all the DM's and voice-to-text transcripts they may reach for that old tool to prove they can not be censored or monitored. I would not expect teenagers to use it otherwise.