I can't speak about Europe, but I don't think the healthcare records alone would actually help care in the US. Once again the problem is the base incentives - a doctor doesn't actually want to have access to your whole medical history, as it would mean they would have to spend time reading it or otherwise possibly be liable for some detail in it. My experience is that staying at the same practice, even one with its own EMR, they basically ask you to complete a new patient health questionnaire every single year and self-enumerate all of your health concerns. Presumably it's the same incentive of not wanting to have to read, understand, integrate, and synthesize everything from the past.

My problem with your previous comment is that you just baselessly asserted that healthcare standards would go down with single payer, which is a common political talking point that completely ignores how the industry has already been captured and destroyed by private corporate bureaucracy (ie we already have "death panels", only they each consist of a single malpracticing doctor with a computer algorithm and an autosigner). Payment isn't the underlying problem of why healthcare is so bad, but it's certainly another problem for many people who go receive (shoddy) healthcare, and then afterwards end up at the pointy end of fraudulent billing shakedowns.