There's also the opposite effect. B&M stores have limited space, and most people prioritize price over everything else, thus most B&M stores thus stock mostly

There's also the opposite effect. B&M stores have limited space, and most people prioritize price over everything else, thus most B&M stores thus stock mostly cheap junk that works just enough to keep them out of the court system and keep enough customers happy to keep them in business. Sadly, if I want a quality item, or a specialty item, and I'm out of luck.