When would inversion of the subject and verb be stylistically appropriate in Italian?

Inversion of the subject and verb in Italian, moving the verb before the subject, is stylistically appropriate in several specific contexts where emphasis or a certain literary effect is desired. Primarily, it's used for emphasis, particularly when the sentence begins with an adverb or adverbial phrase. For example, instead of saying 'Io non ho mai visto una cosa simile' (I have never seen anything like that), you might say 'Mai ho visto una cosa simile' (Never have I seen anything like that), emphasizing 'never'. Secondly, inversion is often used in questions, although this is more common with certain verbs or in formal language. Thirdly, it is employed in formal writing or literary contexts to create a more elegant or dramatic tone. Finally, inversion can occur after certain introductory words or phrases that naturally draw attention to the verb, such as 'Ecco' (Here is/are). For example, 'Ecco il libro' (Here is the book) is more common than 'Ecco il libro qui'. The key is that inversion is not the standard word order in Italian, so its use is deliberate and intended to achieve a specific stylistic impact.