Most of the builds that I share here use a micro ATX motherboard to save on the cash amount. When it comes to having the lowest price build possible, 9 times out of 10 you’ll be using a micro ATX to save a good bit of cash.
It works just fine, I used a micro ATX board with my first build and moved up to an ATX board when I wanted to make a new PC for myself. I found it less stressful for little things such as using the PCIe slot for an adapter and plugging in the USB slots and buttons into the correct prongs. Little parts like that are easier with a bigger board.