We bought 3 pallets of Almond milk (by mistake! I only wanted 1) at an auction a few years ago. It is all in 1L tetrapaks, and although it went out of date in August 2024, it is still good, and we use it every day.
Crisps - We have a pallet of Walkers cheese and onion crisps in "aluminium" (mylar?) bags bought at a similar time. They are still crunchy and taste fine. Some Morrisons own-brand dorito-type corn chips in normal plastic (with see-through section) bags which came in the same package, didn't fare so well. They lasted less than a year after their BBE date.
Organic Seaweed sheets - these were also packed in "aluminium" (mylar?) bags too (with moisture inhibitor "pillows". They lasted well past their BBE date, but don't taste nice when eaten straight from the bag - maybe this is something to do with the oil that was used (and possibly the same reason as why the "doritos" didn't last long)?
Beer - different types age differently. I don't like beer, but I had loads of Fosters and Stella left over from a party. Both had similar BBE dates. After about a year past their BBE, the Fosters cans started frothing when opening (even though they weren't shaken), and made my stomach feel a bit weird (I was trying to make shandies out of them as I can cope with that!). Stella Artois, on the other hand, was still fine at the same point, and for several months after.
Pepperami - I ate one that was 10 years out of date. It tasted fine, and I didn't die, which was a bonus.

I don't risk it it with meat so much, but you can usually tell as it changes colour obviously.

As I'm trying to eat less meat and more vegan alternatives, a lot of the alternatives to sausages and burgers etc. last a long time after their BBE. Recently one vegan burger had a bit of mold on it, so I scraped it off before cooking it and it tasted fine - I wouldn't have done that with a meat version :/

It really annoys me when people throw stuff out the day after something goes out of date. Whatever it is won't become immediately radioactive/poisonous, are they that stupid?? grrr