My abiding fear is having to go into care and being dependent on the state to pay for me. I have spent 30 years of my life visiting friends, family and others in care. I have seen every type of care home from the superb to the absolutely dreadful and the one thing that come through is: you get what you pay for, if you can't pay your last years will be spent in cramped limited conditions with indifferent care. The more you can afford to pay the better your living conditions and care will be. I accept there will be exceptions but the general rule holds.
So how much is 'sufficient savings'? Sufficient savings is sufficient to be able to afford really good quality care for both DH and myself for at least 8 years. Nowadays the average stay in a care home is two and a half years but over 10% are in care for 6 years plus. The cost of a really good quality care home will be around £1,000 a week. So that is £52,000, or £104,000 for two, take away the average income of pensioner households, £20,000 and it brings the cost down to £32,000 a year, for 8 years that is £560,000
If you accept that care costs could be as high as £560,000, take away the value of your house and what is left is the level your savings should, ideally, be
Most of us will probably not go into residential care, certainly not both spouses for that long, but that is the worst case scenario, and the one I always have in mind.