I brew 20 gallons at a time, got 40 ready now, used to use kegs, but now I don’t have that problem. I went back to bottling. Easy to store, share, give away, drink. My beers are all 8% or above, and age well.
I’m hip to what gnome brewer says. There is a noticeable difference in carbonation when drinking from the bottle vs pouring it into a glass. If beer on tap delivers that carbonation it could help to account for the discrepancy between the math and practice.