> If you define instant as less than half a second then Solana, Avalanche, and various L2s are instant

I suppose. I don’t see why Cloudflare would want to give up that sort of control. The advantage they bring to the table is they’re a trusted brand per se.

Since most existing blockchains are open source they can just create their own Flarechain™ based on existing code. This would give them de facto control but also the appearance of decentralization at the same time. My point is that it's technologically possible.