Circles 2.0 uses 1155 tokens.
Once you realize the possibilities—that you can just send tokens to an address, and the address can then "do stuff," and you can even add a message to this, "and the address can do context-dependent stuff dependent on sender and message"—you never want to go back to ERC20!

It sounds like you're discussing the concept of a more flexible token model, possibly inspired by how some newer blockchain protocols work. In this case, Circles 2.0 seems to allow for more advanced interactions with tokens, like sending them to an address that can then trigger actions or processes based on context (sender, message, etc.).

This kind of functionality opens up a lot of possibilities beyond simple transactions (like ERC20), where the token is just a unit of value. If tokens can trigger specific actions, this would allow for much more dynamic applications, such as decentralized apps that can respond to context or user input in ways that ERC20 can't.

Would you like to dive deeper into how this works or explore other token models?