what are the disadvantages of mini/micro builds ?

[AK169]

I'm going to buy i5 7600 or ryzen 1600
with a 250$-350$ video card (didn't decide yet)
should I buy a Standard ATX motherboard with mid-tower case
or Micro ATX motherboard with mini-tower case
or Mini-ITX motherboard with Mini-ITX case
what I will be missing when I buy a small motherboard ?
I care about:
1- on-board sound
2- cooling
3- durability
I really don't care about multi GPU and overclocking
so what are the disadvantages of Micro ATX and Mini ITX for someone like me ?

 

[XavierMace]

Besides the fact that ITX Ryzen boards are basically non-existent? The smaller the case, the more difficult it is to cool. Beyond that, there's not an inherent decrease in features or reliably in going with a smaller form factor. There's good boards and bad boards regardless of size. It's a question of how many slots and ports do you need.

 

[MagnusTheBrewer]

Cooling becomes more difficult. Micro and mini builds often come at a premium.

 

[Crono]

The main disadvantages are they are hard to work in, so you want to carefully plan out before building; less parts that fit, in terms of clearances (heatsink height, power supply type/size); usually fewer and smaller fan mounts; and they can be more expensive if you want a quality case and the best components for the particular ITX or micro ATX case. Some cases solve restrictive air flow by having vents all over, and that make for a noiser PC if you don't use quieter fans. Some cases fit a full ATX PSU, some fit only of a certain size, and others require SFX.

Micro ATX isn't that much more challenging than ATX, depending on the size of the case. Some of the micro ATX and even ITX cases are ridiculously huge, so check dimensions or case volume to make sure you are getting a small case if that's your goal.

The big advantages of small builds are for portability and smaller footprint (less desk space taken up by a big tower). If those goals are important to you, it's worth considering a small build.