{{ In summary I'm not going to make a blanket statement about Medicare Advantage,
but my multi-year experience with lots data points would be that I would
probably default to traditional Medicare if I still lived in the US. There
are perverse incentives in the process that I don't see likely to be resolved. }}

I'll say. Here's the analysis I did 5 years ago when I turned age 65 and started Medicare.

https://retireearlyhomepage.com/medicare2020.html

One very telling insight I got from an analyst at the State Insurance Commissioner's office was invaluable.

I called to ask about the number of customer complaints for the various Medigap insurers in my state to better inform my choice of insurer. The analyst told me that they get very few complaints on Medigap because there is almost nothing a Medigap insurer can do to cause you to complain. CMS does all the benefit administration and accounting for Medigap insurers, so they just pay out what CMS tells them to pay. And for this light workload, they skim off an average of 20% of premiums paid for overhead & profit. Thus, you can safely choose the insurer with the lowest premium, they're all the same. United American seems to be the low cost operator in this space.

intercst