Tonight I did a bit of soldering for the first time in a while!
My shiny new BME280 temperature sensors have this very handy relatively standard four-pin connector on them for use with I2C, but ESP32 boards I'm using (the HUZZAH32 from Adafruit) don't have it and only have standard bare headers. So I took one of the cables with the new connector on both ends, chopped it in half, chopped four of the separate female "DuPont" connectors I already had in half as well, and soldered them together, and bam, easy connection!