I switched. :-). People on Reddiy used to tell me no one would switch to Lemmy. Also look at Mastodon.
I also know some streamers that stream to both Twitch and their Owncast. To each their own. It's here if folks become interested. Most don't even know a self hosted option exists.
I am technical, but here's the installation for Owncast
https://owncast.online/quickstart/installation/
That's it. The rest is handled from a website front end like Twitch's. But yes, it's more than Twitch.