transferringからsendableになりましたね。 https://forums.swift.org/t/se-0430-second-review-sendable-parameter-and-result-values/71685

This proposal originally used the word transferring for sendable. The idea was that this would superficially match parameter modifiers like consuming and borrowing. But, this ignored that we are not actually transferring the parameter into another isolation domain at the function boundary point. Instead, we are requiring that the value at that point be in a disconnected region and thus have the capability to be sent to another isolation domain or merged into actor isolated state.

https://github.com/apple/swift-evolution/blob/main/proposals/0430-transferring-parameters-and-results.md#use-transferring-or-sending-instead-of-sendable

SE-0430 (second review): sendable parameter and result values

Hello Swift community, The second review of "sendable parameter and result values" (formerly "transferring isolation regions of parameter and result values") begins now and runs through May 13, 2024. The proposal is available here: https://github.com/apple/swift-evolution/blob/main/proposals/0430-transferring-parameters-and-results.md This...

swift-evolution/proposals/0430-transferring-parameters-and-results....

This maintains proposals for changes and user-visible enhancements to the Swift Programming Language. - apple/swift-evolution