For what it's worth, source stability is definitely a much firmer constraint now in the minds of the core team: https://forums.swift.org/t/principles-for-traili

For what it's worth, source stability is definitely a much firmer constraint now in the minds of the core team: https://forums.swift.org/t/principles-for-trailing-closure-evolution-proposals/37265/18 https://forums.swift.org/t/principles-for-trailing-closure-e... Of course this comes with its own concerns, as you can see from that thread.