Thanks so much! Sorry I only just looked at the comments.
I think as you say, postmodernity and modernity are deployed differently here and in a way that can come across as a bit ahistorical (this is largely due to some kind of tricky editorial choices I made here, as Azuma does put some work into explaining how he uses "postmodernity" to refer to a historical cultural moment, vs. "postmodernism" as an intellectual movement). That said, I'm not sure the nihilism point always works out - a lot of postmodern thought to me seems to be better understood broadly along the lines of "there is no underneath; meaning is enacted, not extracted". I see this in your bitsy essay too - the difference you point out between finding meaning and making meaning, the lack of common fluency with the latter, assumption that the former must always be what is at work when writing about media. This is what Azuma is doing with databases - whereas modernity pointed to an inherent shared reality underpinning everything (even if different theories posited competing views on the nature of this shared universal reality), postmodernity enacts a contingent shared reality through discourse production. A lot of postmodern theory in the 1990s seems to be trying to illustrate this shift in thinking about the structure of material and social reality - rather than hollow shells, you get rhizomes, flatness, etc.
One thing I wanted to ask you about in our earlier discussion today was your mention of a hauntological relationship to media. I've been thinking about Elizabeth Freeman's notion of queer hauntology lately, while consuming some "nostalgic" media and also while playing The Witcher 3, which is supposedly contemporary but honestly feels very culturally regressive. Hauntology is interesting to me because I keep coming back to phrases like "I feel like an alien" or "I feel like a ghost". But I'm still learning what the term could mean more broadly, or how it relates in practice to other people's experiences of reading media.