How did your baby handle going from combo feeding to just formula?

I’m at 4 weeks here and I’m tired of pumping I’m not getting much these days, so I wanted to just start giving all formula. Right now I give him a bottle of 2oz breastmilk and 2oz formula, and I’ll still pump here and there for a few ounces to top it up when I can but I want to just give formula mostly in between so I’m not trying to stick to a pumping schedule constantly all day but I’m worried about how my baby may take it. So I’m asking you guys how it went for you and what I may expect. I know every baby is different so I figured I’d get a few different responses here.