Hardly realistic. People go where their friends are. This prevents scattering groups over many different social media. We had them in the 2000s, then only one made it to now (FB). The others that are big now (Instagram/FB, WhatsApp/FB, TikTok) are successful because IMHO are on a different medium so don't directly compete with FB and/or are used by a different demographic (young people don't go where older people are, same as for music.)