Since I'm a geek and enjoy doing this kind of thing with my Sunday morning coffee, I made a spreadsheet, and it was fun learning how to make it plot the different components even though I didn't really need the graphical representation, but I guess it's good to explain it on this forum.
The numbers have been modified, the exact numbers don't matter so much as the math and ideas behind it.

Explanation of the graphic and spreadsheet inputs:
This assumes my current salary is $150K gross, but I live on $75K actual expenses (post taxes and savings). That's what the baby blue and orange blocks depict. I wasn't sure how to deal with taxes so I added a tax multiplier to everything. I picked a number for pre-retirement effective taxes (not bracket) and post-retirement. The pre-retirement seems close enough (Fed+State+FICA...). So between now (54) and retirement (59) spend $92k with taxes and save $44K (brokerage and tax-deferred)
At the end of retirement (past 75), I want to be able to spend $75K (in today's dollars), with SS of $60K (blue), I need another $15K from my portfolio "forever" and I adjusted it for taxes so $17250 (green). It gets a little messy for taxes because SS may or may not have some taxed, but I think that should get us in the right ballpark. In the spreadsheet use a fixed SWR for that SS supplement since it needs to last for the entire retirement.
Now between retirement and age 75 (gogo years) I want to have more fun, so I'm planning on spending an extra $5K (in gray, again adjusted for taxes)
I want to wait till 70 for SS, it's my longevity insurance, or my income floor, so if I retire at 39, I need to make up the $60k/year that SS will eventually provide out of my own portfolio, that my SS "bridge" (yellow)
On to the real reason for my post:
The spreadsheet calculates the amount I need to accumulate for the "bridge" as number of years x yearly need. So if the portfolio keeps up with inflation between now and then, I'd be OK. the portfolio may grow faster than inflation, in which case I have more than I need, but of course we could see a crash right before I retire, or any time during the 11 year bridge.
So what are my options for funding those years?
Option 1: One idea is to build a TIPS ladder for $75K a year from ages 59 though 69 (11 years). I barely have enough in my tIRA to buy such as ladder, but my tIRA happens to be 40% of my investible assets, so I could buy a TIPS ladder, buy equities in all my other accounts to maintain an overall 60/40 AA, and overtime as those equities grow and as I start consuming the TIPS ladder, rebalance to maintain 60/40 or something close to it. I think that's the safest path. it commits me to pulling the trigger now/soon while TIPS yields are good, so it would definitely make it real rather than just talking about retiring at 59. Of course if I'm not ready to retire, TIPS maturing anyway are not a hug deal. If I need to retire earlier (I get laid off and can't find a similar job) then at least I know I'm safe till 59. TIPS could even be sold before maturity but then their price is anyone's guess
Option 2: Out of geekery I autogenerated links from the data in the spreadsheet that automatically enter the scenario in several online FI calculators (the blue buttons below the graph). Click here to see what the scenario looks like in FiCalc. It shows 64.9% of success with fixed withdrawal and even better with more flexible withdrawals. So that could be an argument to say that my portfolio "should" sustain me without the need to go for TIPs. Failure of a scenario in this case means that I may have to live on SS alone once the portfolio fails. It's still not 0 income. I haven't looked at all the scenarios but I'm pretty confident none of them fail before SS kicks in, in fact not sure any of them fail before age 75 and the end of the gogo years
I think in the end the decision of a sure thing vs a more risky but flexible and statistically having more later in life will need to be my decision (and my wife's), but I'm wondering if anyone sees a flaw in the logic above, or has other alternative solutions (MYGA?)
(some of the numbers in the spreadsheet like inflation or portfolio growth are not used in what you see, I simplified by hiding some calculations about future value, etc... that don't add to this discussion)