Just out of interest, why do folks like to include the THX logos/banners on their designs? Is it a nostalgia thing, brand consistency, or a (perceived) mark of high standards?

I can think of solid reasons not to. After 20ish years of questionable DVD releases, THX is hardly a brand of quality these days. But more to the point, it simply isn’t true of the releases we’re likely to put in these cases - Despecialized, Revisited, Silver Screen or any fan edit you care to mention have either been (rightly) reprocessed from their THX-certified origins, or never came from that source to begin with.

Just curious - I guess the last examples stuck out, because that branding is the only text on otherwise beautifully minimal designs. Fox or Lucasfilm might be more apt.