Not booting after December update

Thanks. Nothing obvious in the log unfortunately.

Can you try the following:

  1. Can you confirm whether the alternative method of using systemd.unit=emergency.target also works to boot to a command prompt, or does only recovery work ?

  2. Remove the options you added to cmdline.txt and try booting with your external USB devices removed - does that boot ?

  3. Try editing config.txt and add the following line:

dtoverlay=mmc

If you have a line that says:

dtoverlay=sdhost

then remove it. Does it boot now ?