I don’t see that happening anytime soon, because it will be very hard to convince literally everyone to be ok with what they need and pass on what they want.

Open your wallet and fill ours

Of course they can pull data from their client. But what makes you believe signal would connect to Whatsapp without your explicit consent? If that doesn’t happen, there is none of your data to pull from someone else’s device. I don’t see why you think the ability to make a connection alone puts your (or any exclusive Signal users) data in any danger.

You didn’t even try to answer my question

Ah yes, I forgot that this has actual screens unlike most other foldables. Thanks for the sad reminder.

What makes you think this means Whatsapp will just get access to signals data? If it works by someone saying “sent specifically a Signal message to this number” then the issue is that person’s handling of your data. And even then, signal could just play dumb until you yourself specifically say “allow Whatsapp messages from this number explicitly”.

Edit: also, wouldn’t this make it verifiable that Whatsapp is actually using proper encryption?

What category would that be, put of curiosity?

KeePass can sync no problem. Either right in the app like KeePass2android via WebDAV or just plain old file in a synced folder.