Twitter’s ‘encrypted DM’ functionality is technically defective, opt-in, limited to 1-to-1 text messages, limited to a small user base & generally inferior in all directions to encrypted applications such as WhatsApp, Signal or Telegram…
And all for only $8/month. Let’s say that the way to send someone an end-to-end encrypted message via Twitter remains the same today as it did yesterday.
The alternative would be to opt for #Nostr simply & free!