I can't understand people saying that ff isn't more work than bf (and I switched at 8 weeks with my first so experienced both in relatively early days).
With bf you can stay out however long you want.
With ff you are really quite stuck especially as if you do decode you'd like to stay somewhere longer, you can pretty much guarantee dc won't take a full feed, leaving leftover milk redundant after a certain amount of time.
Sterilising itself isn't that much work but, again, you have a limit as to how long bottles stay sterile, so if you fall asleep (likely) you may well have to start again.
I found forgetting that the kettle was boiled for bottles, and then re-boiling to make a cuppa was an issue in a sleepy haze.
Having a baby wake up for the millionth time and having no real way to comfort them while waiting for a bottle to warm was awful, and they had screamed themselves awake by the time it was ready and then often too worked up to feed properly.
I also found that if my dp was doing a night feed, I was awake for the duration regardless.
The only positive I found, was knowing how much the baby had had. Not that this really 'helped' with anything though?!
I don't mean to sound like I'm bashing ff, I'm not.
But I did find it restricting and hard work.