To weigh in (as someone who has been printing for less than a year, and still learning), you can use a .4mm nozzle to do bricks. Though you need to balance heat, ambient temp, filament type, and vibrations perfectly.
Almost got the right calibration for my bigger printer, managed to fix the vibration/ghosting shortly after this image was taken (and then the heat bed crapped out so troubleshooting that currently haha)
.
