I've looked at it but the cost/benefit just doesn't seem to be there, especially if you read the fine print.
Generally it doesn't kick in until you are unable to do two of these things:
'...bathing, dressing, toileting, eating, transferring, (moving from one place to another in a room) and continence."
Neither my Mom or Mother In Law, who were in assisted living with cognitive dysfunction, "qualified" to start taking their benefits before they died.
https://www.kiplinger.com/article/insurance/T036-C001-S001-when-long-term-care-policies-kick-in.html