Stressing that I am not saying that the commercially available items are necessarily better than what can be made at home, but just that they are of such high quality that -- in light of everything else including time and effort -- there's almost no point in making the homemade version.
The Costco / Kirkland Super Premium Vanilla Ice Cream fits that bill for me.
Honestly, I think that big tub of Kirkland ice cream might be the best commercially available ice cream around -- regardless of price. I put it up against any and all super-premium artisan brand vanilla ice creams out there, e.g. Carmela, Laloo's, Silver Moon, etc.. And, while I might not win every round, I think I'd come out OK in the final score card.
Don't even get me started on brands like Häagen-Dazs, Ben & Jerry's, Turkey Hill, Blue Bunny, Edy's etc. Kirkland would lap those vanilla creations.
Now, I might be able to make a better vanilla ice cream at home, but factoring in cost and effort and time, it's almost not worth it.