In fairness to Facebook (which is a phrase I never thought I'd type) Whatsapp's Signal-derived end-to-end encryption was implemented almost a year after Facebook bought it.
Of course, there's still the flaw of backups to Google Drive being unencrypted. But fortunately that's not the default setting.
Of course, there's still the flaw of backups to Google Drive being unencrypted. But fortunately that's not the default setting.