One more thing I've meant to give a go on my @purism Librem 14 for a while was just doing straight DP over USB-C. I've had a cable for this for a long time from when my NUC was in my office. Anyway, it works fine. Of course having left my regular charger across an ocean this means I can only do this when running on battery since I must charge over USB-C for the time being, but I'm glad it works without issue.