Applied for passport renewal (regular non expedited) for wife:

4/23 - sent via priority mail
4/26 - delivered
4/30 - application showed up in system w/ quoted timeframe of 4-6 weeks; registered email address
.... checked approximately daily; same message as before every day (no final steps notice ever); no emails
5/8 - "We have finished processing your passport, and it has been mailed to you using Priority Mail. You should receive your passport on or about 05/13/2018." tracking number provided

5/8 PM -- "Your passport application is in the final processing stages."