There is nothing wrong with butter. Oils can become rancid. Clarified butter or ghee is even better as they have longer shelf life.
It's an animal product with the obvious ethics problems and cow methane boosting the co2 footprint.
No mediocre substitute holds up to real butter, cow farts and ethics be damned.
This is coming from someone who thought Country Crock was real butter until I was a teenager, because that's what my mother always bought.
I can't even put it in macaroni and cheese these days, let alone on my toast.
Even the expensive stuff like "I Can't Believe It's Not Butter" is nearly repulsive compared to real butter IMO.