Also of note: this decline only continues as long as the Fed actually cuts rates. If they don't, these long-term bond yields make no sense (why would you lend money for 10 years at 3.5% when you can lend money for 3650 successive 1-day terms at 4.75%?)

The logic behind this seems a bit circular to me. Market participants accept lower long-term bond rates because they expect the Fed to cut rates in the future. They expect the Fed to cut rates because if they don't, there will be a financial crisis. There will be a financial crisis because long-term bond rates are high and banks are underwater on their bonds, except that bond rates are declining because the Fed is going to cut rates, because...uh, why is there going to be a financial crisis again? What reason does the Fed have for dropping rates? It's very much an "appeal to consequences" fallacy - some bad outcome is not going to happen because that would be bad. The world doesn't work that way.

IMHO the market is wrong, and the Fed is not going to cut rates. They've gotten too accustomed to being bailed out, and the Fed is on to them, and so they're not going to do that again, at least not in the form that the market expects.