Improper storage affects longevity. To estimate longevity at a suspect store you need to know actual manufacturing date not manufacturer's arbitrary best before.
But it doesn't even have to be stored improperly. If you see that this loaf is made two days ago, you will go and find a better place with fresher bread with fewer preservatives or whatever. Manufacturers and sellers obviously don't like it though. So they present you a choice between best before 1 or 2 days from now. Good eh? If you see two loaves with 1 day best-before difference, you'll go for the one with lower date and calmly go home eat your stale bread.
Or you learn to simply ignore the best before and buy bread where you know manufacturing date.
Of course if you are in a third world country likely no one audits factories for compliance and the manufacturing date is also pulled out of someone's ass.
But it doesn't even have to be stored improperly. If you see that this loaf is made two days ago, you will go and find a better place with fresher bread with fewer preservatives or whatever. Manufacturers and sellers obviously don't like it though. So they present you a choice between best before 1 or 2 days from now. Good eh? If you see two loaves with 1 day best-before difference, you'll go for the one with lower date and calmly go home eat your stale bread.
Or you learn to simply ignore the best before and buy bread where you know manufacturing date.
Of course if you are in a third world country likely no one audits factories for compliance and the manufacturing date is also pulled out of someone's ass.