i dont think anyone is killing anyone.
anything can happen.
but cheaper, faster and most reliable always wins in long run.
Theoretically speaking there are many blockchains that are faster than solana and ethereum, but most of them don't get the hype going so people just never put their attention into them.
SUI is a really fast blockchain 300k TPS compared to solana bout 65k TPS only but market cap still below solana.
I think the main deciding factor isn't just cheaper and faster, but also hype.
These numbers are meaningless, nobody needs that kind of TPS for true cryptocurrency. That is why they started also introducing sub second block time, because they do not know how to build anything actually more useful so they end up in a race regrading TPS and block times.
Hype helps only create temporary relevance, and in recent times it is mostly to get the VCs and early investors to cash out massively at the expense of retail. Long-term it does not help that much. As you see in the case of examples as the user below mentions.
I doubt it. Back then, TON (Telegram's "The Open Network" Blockchain) was hailed to be Solana's "successor" or "killer" only to fail in the long run. Sometimes marketing/PR matters most than the underlying tech of a cryptocurrency. In this case, Solana has better marketing than TON. But the latter has better tech. Especially in its approach for scalability.
I believe the "Solana hype" will last for quite some time. After all, "meme" coins are getting popular on the platform. Not sure if SUI will be able to gather the attention of the masses, though. It's relatively new and widely unproven. Between SUI and Aptos, both are neck-in-neck in their use of the "horizontal scaling" technique. Either one of them could become the "next Solana". That's a big "IF" because of the reasons mentioned before. Crypto land often behaves in many strange and bizarre ways, so anything's possible.