We've had occasion to say something about this [new 2015] production in a prior S&F entry based on a live audio stream of the premiere by BR Klassik Radio as well as on act-by-act production photos and verbal descriptions of the physical action and this new HD video [of the entire production] held no surprises for us as far as the staging is concerned. We previously called that staging sophomoric and sophomoric is what it proved to be, from the conceit of Act I's blatant if only tenuously symbolically apposite allusion to M.C. Escher's impossible staircases leading nowhere, to the bizarre sci-fi futuristic prison of Act II (yes, this is a Regietheater staging — what else? — and Act II is set in a prison run by the henchmen of this production's tyrannical König Marke wherein Tristan and Isolde are held captive along with Kurwenal), to the imagined symbolic rightness of Act III's utterly black, all but featureless blank stage and background with its reappearing, floating, Isolde-filled triangles of light (perhaps a reference, if reference they indeed are, to the tent-like structure Tristan and Isolde jerry-rigged in the prison of Act II to hide them from the searchlights of König Marke's henchmen, but given Katharina's sophomoric Regie mentality we shudder to think what else those triangles might be a reference to), not to again speak of the imbecile close of the music-drama in this staging wherein Isolde is ripped away from Tristan's corpse and dragged off by König Marke very much alive as if she were mere chattel. Finally, after having seen the full production, to all the above we now feel compelled to add how appalling the disconnect is, emotional and intellectual, between this staging and the nonpareil transcendent work created by Katharina's great-grandfather more than 150 years ago in what proved to be an ironic attempt to compose an opera that could be mounted quickly and easily even by theaters of modest means. We do, however, have to give Katharina credit for cleverly and neatly doing away with the magic love potion thing upon the magic of which potion even those who ought to know better are still wont to lay blame for the lovers' out-of-control passion for each other.If you think this all quite horrid we assure you the actual witnessing of this Regietheater staging is a full order of magnitude more painful than is the reading about it. Currently, following Bayreuth's lead, Regietheater Wagner can be seen on the stage of almost every major opera house worldwide, New York's Metropolitan Opera, arguably the world's most important opera house, included,** which opera houses are the only established opera venues with the wherewithal, talent, and facilities to stage Wagner's stageworks properly. And so, to restate the opening question, What damage, if any, would be done to world culture were it the case that in no competent public venue could the stageworks of Richard Wagner be seen presented true to the way Wagner set them down with their hallmark, artform-defining organic unity of music, text, and stage picture that's the unique and special genius of Wagner's art? For an informed some, ourself included, the answer is manifestly clear: appalling damage; damage so appalling as to be virtually unthinkable. Curiously and inexplicably, the jury of the opera world is still out on the question even after some 43 years of accumulated hard evidence arguing against Regietheater Wagner as Werktreue Wagner and so the unthinkable threatens perennially to become appalling, permanent reality worldwide. This may seem a thing of concern only for dedicated Wagnerians who are but a small minority of audiences for opera. But a moment's reflection will reveal just how tragically myopic is such a view. For absent the existence of genuine Werktreue presentations of Wagner's stageworks, opera audiences, existing and new, will be denied the essential fundamental references necessary to understand and assess the value and worth of those stageworks as well as the value and worth of their creator and the impact of both on the shaping and development of the artform, not to even speak of being denied the sheer, soul-enriching pleasure of experiencing the stageworks themselves as their creator imagined them experienced. Appalling damage indeed, and no small matter, as we're certain most, if not all, will agree.