if you have group-based insurance, or even good individual insurance without carve-outs for pre-existing disease the current system gets the job done...
If you are entrepreneurial or want to ER and don't have access to continuation insurance other than COBRA, or if prior illness makes you uninsurable, it's also potentially awful. In such cases it's occasionally catastrophic, leading to personal bankruptcy combined with illness...
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I'd like to see more consistency under the umbrella of basic universal coverage. I'm disinclined toward socialized medicine in the USA, since we seem too culturally individualistic to support it as a nation. I'm OK with basic coverage for all, with add-ons if you are willing to pay more, but the definitions of what is basic coverage can get tricky.