Call me ignorant but Twitter seems no different from what it was a year ago. There has been way more media attention and pearl clutching since Elon's takeover, but that hasn't translated to noticeable a difference in terms of usability and product.
That said, I concur that Twitter is doomed. It was already not very profitable before advertisers started backing away, and Elon's tendency to "move fast and ignore regulations" won't serve him very well in the current climate of tightly regulated social media. Elon's piggy bank is no longer unlimited due to the revaluation of TSLA and the tendency for his huge sales to drive the price down even further.
Here's an example I just pulled up that's the second thread on my feed: https://twitter.com/LordCarsonEsq/status/1615134592222257155
There are six replies here. If you refresh enough, you can see a different subset of two replies, so that's probably not a spam-filter.
Twitter had tightened the reigns on them years ago because it just cost them money to keep them alive. It makes sense that would be first on the chopping block when they're looking for cost-saving measures, and I figured it was inevitable regardless of the Elon takeover.
I have a feeling it's coming for reddit too. That one I dread cause their official app is horrible.