Yes, it's that.. you can easily find someone with regrets of having thrown something away which actually turned out to be useful later (I have lots of those), but it's very rare to find someone saying "I really regret I didn't throw that away" (unless it's e.g. some chemical stuff which went bad and created a mess). So, better safe than sorry.. I've hoarded a lot of stuff, but I've also realized there's not enough time left in life to use everything, even though I only hoard stuff I'm actually interested in. So I dump stuff. And sometimes I regret it - where's that nice piece of wood I had stashed away, now suddenly it would have been useful.. so I go and buy, instead. And so on.

Fortunately digital content rots extremely slowly, especially if emulation is available. Physical stuff sometimes does, the more chemical or advanced it is, the more it rots.

With physical things it really depends on what you save. I personally tend to keep a bunch of hardware around many people would not. Some of those things will most definitely go out of usefulness date before I get to them, but are hard to get anyway so weird to get rid of. These are liable to become useless. Others are older spare parts that would not, but I cannot be bothered to sell them just yet... They might go out of style and become useless, but are likely to keep their value.

Yet more are some pieces for plans the didn't pan out yet, but they might. These won't break or might get used for something else. And a few fixable broken things that are not quite junk. These might get fixed depending on requirements.

That is different from my mom's minor hoarding in that she keeps things that will not get used for anything ever, look cute but are horrible to keep, and additionally I do regularly clean out total junk...

The new meta is to give stuff to people who will make use of it.