I recently received a letter from a couple that decided to retire from New York to Washington because of its cultural attractions. My wife and I do have long-term care insurance. It is a group policy that we bought through The Washington Post. The cost is less than otherwise because it is a group policy. I think LTC is a good idea if you can afford it without adding too much stress to your retirement budget.
Nursing homes are very costly, although one's chances of going to a nursing home are fairly low.
The decision depends on both the state of your health and your finances. Because I had an opportunity to continue to write on a free lance basis after I left my regular writing job at The Washington Post, I have been very busy. But it made me realize that it is very important to continue to be active in retirement. I think that long before you retire, you should decide what activities you want to pursue in retirement. Retirement is a major change of lifestyle.