zlacker

Drilling in on my data by month, it looks as if July or August, 2019, was the switch-over, with another big hit in Dec 2019 / Jan 2020:

   2018-1 *************************************************************************
   2018-2 ************************************************************
   2018-3 **********************************************
   2018-4 *********************************************************************
   2018-5 ***********************************************************************
   2018-6 *******************************************************************
   2018-7 ****************************************
   2018-8 ********************************************
   2018-9 ****************************************************************
  2018-10 *************************************************
  2018-11 *****************************************************
  2018-12 ****************************************************************
   2019-1 ************************************************
   2019-2 *************************************************
   2019-3 ************************************************
   2019-4 *******************************************************************
   2019-5 *******************************************************************
   2019-6 *****************************************************************
   2019-7 ******************************
   2019-8 ******************************************
   2019-9 ************************************************
  2019-10 ********************************************
  2019-11 ***********************************
  2019-12 ********************************
   2020-1 ************
   2020-2 ************
   2020-3 *****************
   2020-4 ************
   2020-5 *******
   2020-6 *******
   2020-7 ************
   2020-8 ************
   2020-9 *******
  2020-10 *******************
  2020-11 ********
  2020-12 *****************

(July seems to be an annual slump in HN -- NYT submissions for some reason, which confounds analysis somewhat.)

(Apologies to mobile readers ;-)