@mayintoronto I think that, looking more broadly, "centralization of production power" doesn't adequately capture the main issue with surveillance capitalism.
(Frankly, I think that Zuboff's book is one of the most important books of the XXI century)
People don't use LLMs only (or even primarily) for coding. They often share very personal information about themselves (and people around them), because they don't feel judged.
As a result, those who control these models have the capability of making "Google Street View" of peoples' minds, but accessible only to the "congnoscienti".
As a result, corporations have more and more power over people (in every aspect of their life), and - because corporations slip away from democratic control - consequently people have less and less power over themselves (which is why the term "technofeudalism" is probably more adequate than "capitalism").
As to purpose-built tools, I'm not sure I entirely agree. I think that LLMs owe a lot of their capabilities to their "general intelligence", and that it generally shows that the more advanced models are more capable than the less advanced ones.
But it also turns out that LLMs themselves are eager users of human-made frameworks, as that those frameworks often save their time and allow them to make less mistakes.