If you or anyone you interact with has cloud backups on for WhatsApp, which in my experience ~90% of people do, all your chats are uploaded to Google Drive/iClo

If you or anyone you interact with has cloud backups on for WhatsApp, which in my experience ~90% of people do, all your chats are uploaded to Google Drive/iCloud in what is essentially plaintext. If not for this flaw and the fact that we can't tell whether the encryption is implemented as they say in their whitepaper for their clients, I would have put it well above Telegram and closer to Signal in terms of security and privacy.