I agree, there can be a lot of things to set up in the way of wills, trusts, & similar. A relative is nearing the tail end as an executor for a guy that passed fairly suddenly. This individual was 72, never married, no kids with properties & investments at 4+ million. He had one notarize will, a few unsigned copies and a brother he hated.
As to the financial planner after retirement, yeah, to each their own. There are certain pots of $$ that makes sense to draw from 1st, then you have the usual health care options. I just wonder if one didn’t have much of a relationship with a financial advisor along the way, any need to have one after retirement? I know, varies with individuals.
To me a biggie can be to have beneficiaries for assets to transfer, best you can. Not that you really have to leave anything to anyone, seen to many just fighting over $$ after one passes.