I think the big barrier with romantic relationships in media is a reluctance to give characters a "happily ever after" trope, so will they/won't they creates simpler drama over having a couple endure.
The trouble with that is that when binging, those dynamics end up feeling highly exaggerated, and if if they wait too long and one of those characters ends up leaving the cast, then you've got nothing. As an example, that's pretty much exactly what happened in Murdoch Mysteries with George and Emily, where I felt they were a great couple. They kept prolonging the 'will they/won't they dynamic' until she had to leave the cast and lost their chance to solidify something great.