Nothing to do with shops. It depends on use cases, usage intensity and quite simply luck.
Just what I could find quickly from my “flash memory which gave up working for devices” collection, everything bought from well-known shops (as opposed to obscure internet outfits popping up in price comparison portals from time to time):
- Samsung MB-MSAGA Essential Class 6 microSDHC 16GB
- Adata Class 4 microSDHC 32GB
- Transcend MM8GR01GUACA-NA microSD 1GB (Samsung made, if the internet is to be believed)
- Transcend JetFlash T3 USB 2.0 stick 1GB
- Kingston DataTraveler DTU30G3 Ultimate Generation 3 USB 3.0 stick 64GB
That you can’t have unlimited write operations to flash memory is well-known, but apparently controllers in flash memory devices may simply stop writing for whatever invisible reason, rendering a flash memory device read-only. And that’s the “good” failure in which you at least get to keep your data because you can still read it.