I (and the finance team I work alongside) strongly second this feature request. It should be an optional setting. We use Zapier to automatically create our draft invoices so we can't leave out the 'To:' field to avoid autosaving. And we dislike the autosave feature at times as it prevents us from cancelling our changes and starting again if the editing of a draft invoice goes wrong.
I (and the finance team I work alongside) strongly second this feature request. It should be an optional setting. We use Zapier to automatically create our draft invoices so we can't leave out the 'To:' field to avoid autosaving. And we dislike the autosave feature at times as it prevents us from cancelling our changes and starting again if the editing of a draft invoice goes wrong.