We moved to Skype because of the end-to-end encryption, the group chats feature, the ability to talk and the network effect from others using it and us not want

We moved to Skype because of the end-to-end encryption, the group chats feature, the ability to talk and the network effect from others using it and us not wanting to use two clients at once. Oh, and with Skype file transfers would just work, while no ICQ client would ever let me initiate a file transfer to another person, or if it did, it would go though servers on the other end of the world.