It depends on which community you're in, honestly. Over on Tumblr and certain Discord corners, there's a whole cottage industry of analyzing the wraith's origins, pulling from bits of lore in the books and even 'The Tales of Beedle the Bard'. Some interpretations lean into it being a remnant of an ancient, forgotten magic that pre-dates the Founders, tying it to themes of mortality and obsession that Rowling plays with elsewhere. They see it as a symbol of magic itself becoming corrupt and parasitic when severed from a living will.
Then you have the more character-focused readers, especially on BookTok. They often link the wraith directly to Tom Riddle's psyche—a literal manifestation of his fear of death and his inability to form real human connections. The wraith isn't just a plot device to explain his survival; it's his soul stripped bare, all ambition and hunger with none of the charm. It makes his eventual restoration in 'Goblet of Fire' way more chilling. He wasn't just brought back; he had to rebuild a body around that shriveled, hateful core.
I've seen some wild but weirdly compelling theories that it's almost a separate entity from Voldemort after existing so long alone, like a magical echo that developed its own predatory instincts. Whatever the take, it adds a layer of horror that the movies couldn't quite capture.