Our 2017 X100D has the OEM 'Continental cross contact lx sport' with 38K on them. I also had them on a 2016 P90DL Sig and had over 36K before deer incident.
I'm replacing them this Fall before winter. They are 4 to 5/32nd still (pict below)
I looked at many threads on this topic. Caution that some other tires will increase the Wh/Mile efficiency. As good as luck in weather, ride, and efficiency as I've had with the OEM on 2 Xs, I've come to the conclusion I'm going to get them again.
"Your mileage may vary"