I don’t understand the resistance to changing platforms that many people and especially companies show.
For example the company I work for refuses to consider anything except Xitter. Casually talking with the people running social media, I concluded they think about platforms as a fixed fact of nature, rather than something flexible that you can experiment with.

There’s basically a minimal cost to having a multi-platform presence. Copy/paste your posts to 3 places, there are even tools to automate it.