The conventional senior options offered at one end is private, for profit retirement homes with costs varies from $5000-6000+ for a couple at a middle of the road place or $3500-5000+ for one person.  $6K after tax cost per month is approx. pre-tax income of $100K per year.  Average household income is around $65K and retired households are lower than that so very few seniors can afford that run rate without dipping into their capital and likely running out of money down the road.

On the other end spectrum there are LTC where there are not enough beds for everyone and fewer beds still at well run facilities with good staff.   I think that is why there have been more recent initiatives to help seniors to age in the community with aging population.

There should be exploration of more creative options such as Abbeyfield House (nonprofit UK model), co-housing / intentional community (Denmark Origin), Baba Yaga (France for older women), Buurtzorg, Hogeweyk and Japan's Dementia insurance