A terrible step back for privacy and it's crazy that Meta announced this by updating a support page https://www.androidpolice.com/instagram-is-getting-rid-of-end-to-end-encryption-for-dms/
Instagram to discontinue end-to-end encryption for DMs [Update: Meta's statement]

Pulling the plug on privacy?

Android Police
cc: @alecmuffett
I would like to know why. Currently my most plausible entirely unsubstantiated and groundless guess is basically Conway's Law and that Instagram proved incapable of merging projects with the broader E2EE projects.

But I would still be interested to know the truth.