There been many previous discussion threads on this topic - mostly quite interesting.
I looked into the topic a few years back when I was considering bringing my elderly mother here to live (which didn't ever happen). I looked at a few places in/near Chiang Mai.
One place sticks in my mind (name forgotten, sorry) but my first impression was quite positive. Then I went into serious review mode and would subsequently describe it as a place designed and built by someone who has only seen fancy magazine articles on western aged care home, but had never worked in one. So caution here, folks.
Things like slip or trip hazards, switches that couldn't be reached, steps instead of ramps, etc, etc. Someone in a wheelchair for example, would simply not have been able to get around the facility. Someone with dementia could just walk out of the facility and down the road, etc etc.
Maybe in a few years time they will get it right ... and then it could be fantastic