Perhaps I should come clean straightaway and admit that, despite the fact that OperaUpClose is about to celebrate its fifth birthday, I’d never been to see one of its shows before last week. This has not been a conscious decision; maybe, though, I’d been unconsciously put off by the company’s early braggadocio — by the manner in which it gleefully trumpeted the Violetta-like decline of ‘traditional’ opera so that it could offer itself up as a timely cure.