Another bit is that Explorer's Save File modal does autocomplete for file names, which has the side effect of immediately alerting you that a file name is alrea

Another bit is that Explorer's Save File modal does autocomplete for file names, which has the side effect of immediately alerting you that a file name is already in use before you submit, but is also massively helpful when you're naming consecutive downloads with a naming pattern. That latter case would be supercharged if Finder supported this on macOS as the global text edit bindings are more ergonomic for me than those shared between Windows and Linux.