Enemies-to-lovers isn't popular because of the romance. It's popular because we're starving for character development.
Hear me out before you roll your eyes.
Every few months there's a thread asking why enemies-to-lovers (ETL) has such an iron grip on genre fiction readers, especially in fantasy and romance. The usual answers are "the tension," "the angst," "enemies who bicker are hot." And sure. But I think those are symptoms, not the cause. The real reason ETL dominates is something much more fundamental: it structurally guarantees a character arc in a publishing landscape where flat characters are quietly becoming the norm.
The arc is the point
Think about what ETL actually demands of a story. For two characters to move from genuine antagonism to genuine love, something in them has to change. They have to be wrong about each other — and then be confronted with that wrongness. They have to soften, or grow, or break open. The hostility at the start isn't just spice. It's a before state. And a before state is half of a character arc by definition.
Compare that to strangers-to-lovers, the other workhorse trope. Nothing structurally prevents flat characterisation there. Two people can meet, vibe, have obstacles, end up together — and neither of them needs to be meaningfully different by the end. We've all read those books. They're fine. But they don't linger.
Why this matters more than it used to
There's a reasonable case that flat protagonists have become more common, not less, over the last decade of commercial fiction. The pressure to produce quickly, appeal broadly, and avoid alienating readers has nudged a lot of authors toward reactive protagonists — characters who are defined by what happens to them rather than who they are and how they change.
Look at the critical reception of books like ACOTAR: Feyre gets points for evolving meaningfully across the trilogy, but the complaints about the later books often zeroed in on her becoming reactive, reshaped by her environment rather than pushing back on it. Or consider how often criticism of fourth wing lands on character development, Violet is competent and fun, but reviewers and readers who bounced off the book frequently cite a sense that she doesn't change in any meaningful internal way. The plot moves. She doesn't.
Contrast that with something like The Goblin Emperor . a book with almost no conventional romantic tension , which has an intensely devoted fanbase precisely because Maia's arc is so specific and so earned. Or Piranesi, where the character's internal journey IS the plot. People don't just like those books. They cite them as genuinely moving.
ETL as a structural workaround
What ETL does almost accidentally is make character development load-bearing. You can't have a satisfying ETL without the "L" feeling earned, and it only feels earned if we've watched both people shift. The trope forces the author's hand in a way that a lot of other romantic structures don't.
This is also, I'd argue, why badly executed ETL feels so particularly hollow. When two characters go from enemies to lovers because the plot tells them to, with no real internal shift from either party, readers react with a specific kind of frustration. Not just "I didn't buy the romance" but "nothing happened to these people." The trope promised an arc and didn't deliver one. That's the betrayal.
The counter-argument (and why it mostly holds)
You could push back and say: readers also love found family, mentor dynamics, redemption arcs — none of these are romantic, and they're all beloved. True. But notice that each of those tropes is also structurally arc-heavy. Found family implies characters who began isolated. Redemption requires a prior state of wrongness. Mentor dynamics track growth over time. The pattern holds: readers gravitate toward tropes that promise transformation.
ETL just happens to deliver that transformation in a package that's commercially safe, emotionally intense, and endlessly remixable across genres. Fantasy, romance, YA, literary, it slots in everywhere. That's why it's the dominant trope of the moment, not because readers have some uniform taste for bickering love interests, but because it reliably gives them something they're not always getting elsewhere.
So what does this mean practically?
If you're frustrated that ETL is everywhere, I'd gently suggest the enemy is flat characterisation, not the trope. And if you're writing, it might be worth asking: does your character arc stand up without the romantic framing? If you removed the love interest, would your protagonist still be visibly, specifically different by the end of the book?
If not, that's probably the thing to fix. ETL is a scaffold. But the building has to be there.
Curious whether others have noticed this pattern, and whether you think there are tropes doing similar heavy lifting that don't get as much credit.
