"Workplace" accounts are completely separate, with the exception of an optional link to your personal account to make it easier to log in. To my knowledge, no other data is shared. Your employer owns the data, not Facebook.
Will they support generic 2factor auth apps or will I have to use a separate Facebook workplace app to generate auth codes for logging in?
I'm already annoyed that I get my two factor codes from two different apps (one for Facebook, one for everything else), I'd be extra annoyed if it had to be three.
I dream of the day where I'm not followed around by my data exhaust. It's just wishful thinking.
I feel that the marginal benefit of social media systems has peaked. It's begun to make interactions less human and less personal; the gain over using email is negligible. I don't need to see your picture, I just want to know when I'll have VPN access.
The Workplace account exists completely separately of your private Facebook account. Can you point to specific evidence that suggests they're the same/linked or do you just "feel" like they would be?
Understanding software systems, there are any evidences that says it's separated? They use data from instagram and whatsapp, which they still call different companies. What would make us believe they aren't going to exploit it the same way they already do?
See https://workplace.fb.com/trust/.