The main reason I have insurance is to help DW (family) financially when I pass. She (family) no longer needs that help.
Just cash it in or probably just look at in investment terms?
A life insurance death benefit provides immediate income tax free liquidity at death. Since you're talking about cashing in, I am assuming you are talking about whole life. If it's more than a decade old, it is likely that it will have a taxable gain if you cash it in. That gain will be taxed at ordinary income rates.
Also, the existence of a permanent death benefit allows you to use other assets more efficiently. For example, using a life income annuity can provide much better cash flow with favorable tax treatment, than just income from the asset, and the death benefit can replenish the asset at death (this can also be used in LTC planning).