So you are nervous about the market taking a dive, but you are nervous about not getting the highest expected return.
Sorry but you can't have your cake and eat it too.
I actually said neither of those things. Recognizing a market slump as the #1 risk to my expected retirement date is not the same thing as being nervous.
You need to transition your thinking. Before you retire, you want to accumulate assets in order to retire. The goal is retirement. It sounds like your goal is being greedy (which is very normal in the stock market). If you're greedy, you will eventually hit a stock market correction. If your goal is retirement, and you're very close, you need to protect your assets - not try to maximize them.
If your retirement assets double, you still only retire once. But if your assets get cut in half that could ruin your retirement. So the goal is protecting your assets in retirement. If you're nervous about not having enough... retire later. If you're just being greedy, that won't change. You can be greedy, or you can try to protect retirement assets.
As for being greedy/not getting highest expected return... Perhaps that's a part of it. But isn't there a very real risk of outliving a portfolio that is invested too conservatively? And on the other hand, there is the sequence of returns risk.
But point well taken MustacheAndaHalf. I definitely need to change my investing mindset, which I appreciate all of you helping me to do.
It's too soon for me to be nervous about not having enough. The plan has always been to work a few more years, and there's nothing stopping me from working beyond that as conditions dictate. I am in a very stable place as far as career, housing, and cost of living vs. salary. If anything, my savings estimates are likely conservative, and I would not be surprised to have a savings rate of 20x annual spending over the next 5 years, ending with a 2.5% portfolio withdrawal rate.
Again, I thank everyone for participating and setting me on a better path. For now, I'm going to prioritize capital preservation and direct 100% of new investments to Treasuries. I may end up pulling the trigger on that reallocation eventually, but since I'm not pressed for anything at the moment, I may not need to. We'll see what the next few years bring.