Anything that's not the current American culture wars? The same things most people talk about in their lives when not throthing at the mouth on Twitter. (i.e. comedy, sports, tech, food, animals, jobs, cars, etc.)
And, of course, culture wars will still be discussed, but it doesn't need promoting to those not interested in arguing such things on social media.
By your argument "one side" has "free speech" to do what they like on Twitter now, and it's not the "mobs" you're trying to denigrate in your comment...
https://www.vice.com/en/article/n7zm9q/elon-musk-twitter-naz...
https://www.lemonde.fr/en/les-decodeurs/article/2022/12/19/c...
https://www.thetimes.co.uk/article/elon-musks-twitter-welcom...
https://apnews.com/article/twitter-elon-musk-transgender-dea...
https://www.nbcnews.com/tech/twitter-changes-hateful-conduct...
It's worth noting two things while you have mock outrage about "free speech":
1. While claiming to be a free speech absolutist, Elon is absolutely not one -- taking action against critics (whether cancelling orders, firing, or suspending accounts), rather than -- like he would claim otherwise -- allowing people to have unrestricted speech.
https://www.theguardian.com/technology/2016/feb/03/elon-musk...
https://www.barrons.com/articles/twitter-suspends-plainsite-...
https://www.pbs.org/newshour/show/twitter-faces-criticism-af...
https://www.theverge.com/2022/12/15/23512004/elon-musk-start...
2. Free speech isn't what you think it is... https://xkcd.com/1357/
You are correct about Musk not being a real free speech absolutist. All other claims are strawmen.
I've banned some of the other accounts who were posting flamebait stuff in this thread, because they didn't have much history and some look like serial trolls. I don't want to ban your account because it's been around for a while, so if you'd please review https://news.ycombinator.com/newsguidelines.html and use this site in the intended spirit, we'd be grateful.
Edit: We've had to ask you about this more than once before:
https://news.ycombinator.com/item?id=33850557 (Dec 2022)
https://news.ycombinator.com/item?id=33850484 (Dec 2022)
and you've unfortunately been continuing the same pattern in other recent threads (e.g. https://news.ycombinator.com/item?id=36338416). As I said already, I don't want to ban you, but if you don't stop posting like this, we're going to have to—so if you'd please review https://news.ycombinator.com/newsguidelines.html and stick to the rules, we'd appreciate it.
What will people talk about if Instagram is friendly and impartial? My guess is that at best Instagram will allow the pre-Musk toxicity.