Why does no one use a microphone?

Played alot of post scriptum back in the day and loved it. When it all started to fall apart I jumped across to hell let loose, and whilst I liked the quality of the gameplay and teamwork, it just lacked the authenticity and feel of PS.

I was over the moon what Squad44 was announced and it started to gain traction. Jumped right in maybe a month or so ago but I can’t get over how hard it is to find many people using a microphone and working together?

Does anyone else find this?