Tuesday, October 17: Application for passport book only (not renewing the card since I have NEXUS now) mailed via Priority Mail from Seattle to Philadelphia, delivered on Thursday, October 19.
Monday, October 23: Application received by locator 75.
Tuesday, October 24: Check electronically presented (as an artifact of how ACH works, this is going to be the next business day after the check was received)
Monday, November 6: Passport book shipped. USPS received it on Tuesday, November 7 and delivery is scheduled on Thursday, November 9 by Priority Mail.
Wednesday, November 8: Supporting documentation mailed.

Two weeks for regular service without future travel plans. That was surprisingly fast, even faster than when I received my first adult passport in 2014.