A concrete example of a web3 Twitter alternative is https://lenster.xyz and https://lens.xyz/.
My thoughts in general are that you lack an imagination. You sound similar to David Letterman speaking to Bill Gates in the 90s when Bill says you'll be able to listen to a baseball game on your computer, and David responds laughing: "so you invented the radio?" or that you can send emails: "so you invented the fax machine?"
And we look back and think how archaic those methods were. Point being it's hard to see how things will develop moving forward.
We're still early. It's super hard to predict the future. I don't think any of us would have predicted what happened with NFTs this year (or crypto if we jump back 10 years). But it happened and will continue to happen. OpenSea becoming a multibillion dollar business (and yes it makes insane revenues with tiny costs to justify those valuations).
Will OS be generating hundreds of millions in a few years time? I'm not sure. Speculation may die down. Competition may hurt them and cut down their insane fees.
But really getting to the core point as to why Lenster is super interesting compared to Twitter:
Twitter API is limiting and even if it wasn't I run the very real risk of being deplatformed. There used to be multiple Twitter clients. But then Twitter decided to ban them.
The Twitter algorithm massively influences who sees what. People grew from 10k followers to 30k followers and have less engagement today because Twitter algo just doesn't show their content as much anymore. A decentralised Twitter might not fix this but it gives us a chance to.
What can you do with Lens. You can create your own version of it. Lenster is open source but even if it wasn't, the database is open and shared and anyone can create a competitor to Lenster (and is even encouraged to).
I can add features to Twitter when I want. I don't need to rely on Twitter to add super follows or NFT verification. I can make a PR or literally just create an alternative to Lenster.
None of this is abstract. It's all very much happening. It's hard to know whether a platform like Lenster will be able to break down Twitter's moat. The network effects are strong. But either way there are massive benefits to a Twitter with an open database (that they can't just shut down when they want).
And I didn't even get to the monetisation and web3 interopability that Lenster has built in. I've already paid to support a Lenster poster in my first few days using it. Something that Twitter could theoretically add, but 1, they haven't, 2, it wouldn't be as smooth with fiat, and 3, I have to rely on Twitter Inc to add it whereas here everyone can (and people actually are).