Non-winemaking friends are amazed at the amount of wine I make ... until I mention that if 1 bottle per week is opened, a 5 gallon carboy (2 cases) is consumed in less than 6 months. [I mention this off-n-on in the Beginners forum, as new winemakers may not have realized it yet.]
One friend said, "but I don't drink that much wine." My response was, "how much Scotch do you drink in a week?"
The light bulb turned on brightly at that moment, as he often has a shot or 2 of Scotch when arriving home after work. That carboy would last him 3-4 months if he was drinking wine ...
I make 1 or 2 batches (5 US gallon) of white per year. For my needs, this seems to work out. I'm currently debating getting a Gewurztraminer frozen juice bucket, as I have less than 2 cases of white left, from 2018 and 2019. As @JohnW
mentioned, storage is an issue, and at this moment so is bulk aging. I have to re-arrange my barrels to make space before doing anything new.