data layer > business logic layer > presentation layer

I believe the presentation/analytics layer has become malleable, possibly parts of the business logic layer - you still need a higher % of trustworthiness than LLMs can provide for parts of the business and data layers.

> you still need a higher % of trustworthiness than LLMs can provide for parts of the business and data layers

For many domain-heavy systems, it's not even the trustworthiness; just getting the business logic right requires a lot of work and lots of iterations with in-house domain experts and clients, there's no way LLMs can do that.