VS-LTS permits application to pUMA (and carte vitale?)

I've been spending less than 183 days/year in France for 25 years and would apply for a long term stay visa if it would allow me to acquire a carte vitale (AI thinks one can buy into the system based on income). Has anyone from USA done this in the last year or two? If you have and are in the Paris area I would love to buy you lunch and hear your story. I do not intend to become a tax resident, but would like to buy into the carte vitale system and AI interprets the law as a gray area here but cannot find any case studies of people who have done it. Any thoughts?