PCB: 8 metallized holes

Thanks for the answer. But I have more questions. Why are there no 8 holes in the DS3231M, Fermion: AS7341 (and so on) modules (see the pictures below)? If I understand correctly, the contact pads are only needed for mechanical fastening of the modules. If they were connected to the GND, then 8 holes would improve the electrical contact. But the contact pads are isolated from the circuit's radio components. Then why do we need 8 metallized holes at all?

The number was chosen for symmetrical spacing and mechanical stability during installation - like having extra seatbelts in a racecar, even if you only technically need a few. Could it work with 4 or 6? Probably. But eight gives us a nice even distribution pattern that makes assembly processes smoother.

onsider it the industrial equivalent of pizza slices - 8 just feels more shareable than 6! 🍕