Social media platforms are tools. Some like to position themselves as trendy and hip. Of course, so do children of celebrities ... many of whom end up in some sort of drug treatment program. But what matters with a social media site is whether it functions well and enables you to connect to others.
Email is no longer trendy and hip. It is still a vital means of communication in today's world. Those misnamed hoverboards ARE trendy and hip … and have created a spike in emergency room visits. So you can be uncool and email friends, family, business contacts, etc. Or you can be cool, hop on a hoverboard, and visit a burn unit.
When it comes to social media, never mind trendy. Choose platforms based on whether they actually work and if they are good places for you to communicate with fans, customers, etc.