In terms of who the winners were, sure. There were many also-rans like Viber or companies that won only in certain markets like Line or Telegram.

But the idea that the network effects couldn't be overcome was definitely false. Not only are MSN, AIM and YIM so dead their servers are shut down, but the services which displaced them (Facebook Messenger and Skype) have themselves been displaced by a third wave of services (WhatsApp, iMessage, Discord, Slack)