We aren't, not yet, because those digital goods still have an initial creation cost. Digital goods that people consume are made by people.

Yes, they can be copied infinitely for free, but we're only "post scarcity" if we never make anything else new.

With the advent of generative AI, we might just barely be starting to be post scarcity in a couple narrow fields.

I'll bite: we're post-scarcity for a lot of digital items that are useful tools. Goods we need but don't have exist, but I'm not even sure if they are the majority. Existing music, videos, books cover a whole lot of what humans might want - originals are the outcome of research needs (niche) and trends (not niche). Existing software tools are similar: new ones are needed to push boundaries (niche) or mostly as a response to a changing legal landscape (less niche).

On top of that, significant amounts of stuff are created out of an internal need, and would get created regardless.

One thing I'm sure about is that we're post-scarcity in historical items, and we're nowhere past capitalism there. Indeed, preservationists are hitting roadblocks all the time.

You know, that's a fair point. I think there's a great argument to be made that FOSS software in particular is essentially post scarcity.

I'm not sure I'd say we're "post scarcity" for books and other digital goods though. Sure, we have all the books written until now, but I think there's an argument to be made that a huge part of the utility of books is that they are produced in near-real-time to discuss, address, and reflect thecurrent state of society. As our society grows and changes, books featuring the issues of the days will always be desired. This falls into the "trends" category you mentioned, but my point is more that I think it's larger than you described.

Volunteerism isn't "post-scarcity". If you're fed and watered by providing value in a capitalist system, and choose to spend your spare time volunteering, that's great, but it's nothing utopian. Volunteerism is a free choice of work in exchange for a price of £0. That's regular old capitalism at work.

If you could just generate energy out of the ether and use it to materialise food and anything else you might want, for example, that would be post-scarcity.

I insist that it still is post-scarcity if you would provide the same or greater (equivalent) value regardless of the system.

While your definition might be elegant, it's too strict to foster a useful conversation.

You can't look at one area of the economy in isolation. It's all intertwined. The people creating digital goods still need food, shelter, and housing. Things that are not post-scarcity.