Do electronics count? Because I pretty much buy all electronics exclusively from brand names. Even cables, which I'll typically get from Ugreen, since they make high quality stuff.
Even when buying random crap on AliExpress, I'll go with the product that has a brand name on it (any brand name that isn't a random string of letters), the logic being that manufacturers that put a recognizable name on their product have more faith in their product, since they have more to lose from bad reputation.
As far as groceries go, I used to buy name brand of most things, prices have now gone up so that the store brand costs what the name brand did only months ago, or even more, in order to keep my expenses from skyrocketing, I've had to buy more store brand and stop buying certain things altogether because they're just too expensive.
I'd say when it comes to unprocessed meat products, there is none or negligible difference in quality, I've always bought the store brand of those whenever it was an option, but when it comes to other groceries, I've usually preferred the name brand since there can be a big difference in quality but not necessarily in price.
I still buy a lot of name brand groceries, it just comes down to math. If a name brand costs 50% more than store brand, it better taste 50% better to make up for it. And it depends on what I'm making, if I'm using it in food with a lot of flavor where the (possibly inferior or more bland) taste isn't pronounced it would be a waste to pay for the more expensive product anyway and if I can add spices to make up for it then same.
If it seems like a good enough deal compared to name brand, I'll always buy the store brand, there are very few exceptions to this.
One thing I always buy the name brand of no matter what, is cheese. The store brand doesn't slice the same, it doesn't taste the same and it tends to crumble apart when sliced. It's just crap all over, it has half the flavor and it's only 10-20% cheaper.