> clients of established products aren't really waiting for massive changes and gigantic features to be added

In some cases they do. I work in a B2B vertical SaaS company and there’s both features that competitors build or rough edges around our features that make clients go „either we get X or we sign with someone else”. I agree though with the general sentiment that you don’t need SOTA models to build those - humans or humans + mid pack strong model will do.

I have clients waiting for very gigantic features and the agent harnesses are a godsend.