Adding M2 slots to a motherboard can provide more storage options for the internal components of your computer. This is especially beneficial if you use a lot of storage devices, such as hard drives or SSDs, and want to maximize the space available on your motherboard.
Adding M2 slots also allows you to upgrade your components more easily, as you can simply remove the old component and replace it with a newer model that uses M2 slots.
However, adding M2 slots to a motherboard may not be necessary if you don’t use a lot of storage devices. If you only use a few storage devices, or if they’re located in locations that don’t conflict with other components on your motherboard, you may not need to add M2 slots.
Ultimately, it depends on your individual needs and preferences.