FI.
A part of me expects the DH will probably want to work in some form long past when we are able to live a pretty lavish retirement (lavish by MMM standards, at least). My father followed a similar path. At 73, he's still working a consulting gig, and has had a paying gig of some kind since he started working, other than a few 6-8 month gaps here and there. He does it because he enjoys it, mostly. My parents certainly don't need the money. In their 70s, I believe they still have positive cash flow (due to two very nice pensions, carrying the mortgage on two and now only 1 home owned by someone else, dad's pay check, and probably some other things, too).
His current boss is about to retire, and that may be the end of his consulting gig, and I think he's a bit sad about that. He only works a few hours a week, plus a 3-4 day business trip every few months.
Anyway, I can see DH being like that. So the goal is really to get us to the point where he can be choosy about what work he takes and so that we don't have to worry if he leaves or loses a gig. Or so that if he changes his mind and decides to devote himself to being a Master Gardener (or whatever), that option is available to him. I, OTOH, may already be RE, as it turns out. We'll see where life takes us, but it's somewhat possible I may never work full time again.