Sorry for the shameless plug but check out what we're doing at Emerge. (Savinghealthcare.net)
We are offering better, cleaner amd aggregated patient data at the point of care. We use ML not to predict patient outcome or progress but to make sense of the data.
I disagree. The concept of personas is useful for abstracting the user's previous experiences and habits formed, not their current goals.
It's a useful abstraction that should be considered an abstraction and not a concrete example. When discussing 'stay at home moms', we're encapsulating the past experiences of such personas.
I am the CTO of growing startup and every single point resonated with me.
I wish I'd read this 3 years ago and heeded your advice.