I just pulled down Fedora-IoT-29-20181120.0.aarch64.raw.xz
 booting my RPi3B+ has a repeating error:
  ~ 'NG at drivers/mmc/bcm2835_sdchost.c:408/bcm_2835_send_command()!

 There have been some mention about SD cards as a potential factor.  Is that correct?
How is that making an impact?  Is it speed, quality?  

 As a note, the SD card I used for this test is a Kingsington 8GB HC 4

 Let me know if I need to provide more details, OK?

 What can I test / try / attempt next?

Thanks for your time.