TeamSpeak is used significantly.

I used to play on Goblin (2013 ARR launch - May 2015), and my entire FC transferred servers to Gilgamesh last spring.

As you are a new player, I recommend you join a free company to help guide you.
The Dark Lords are a great group at helping out new members. Penny, Pookie, Aldric, and Retik are great people.
Kupopolis is lead by friend Gem Beloved. Gem created an alt character on Gilga to continue playing with us.

Re: server transfers, a small server like Goblin has two major faults and one big advantage.
Faults:
1. It can be difficult to put together good raiding parties due the lack of players around. When we were still there, it was common to put up a PF for an end game raid and watch 5 hours go by without it filling. On Gilga by comparison, it is rare for PF to take longer than 20 minutes to fill.
2. The limited number of players also contributes to higher prices on the Market board for most items.

Advantage:
Housing is almost always available.