It had me think...
I first started with only 5 RL friends. My friend list only contained 5 RL people altogether when D3 first came out. We played every night for many months.
Then, 3 exited and filled my list with 100 new friends.
Last night, still 41 people were playing which I consider to be not bad.
For example, lameboi, zhouxin, juicehouse, aphraell, jellyroc, Canac exited. Mnz, dolynick, Issachen, lintrasu, Bangarang entered.
so...list goes on. Big part of it has to do with being active in the forum. and you find out that majority of them are cool I think.
Void will be gone. but someone will replace his spot eventually.
I think saying goodbye is hard.