The Dagster team has made significant changes to their APIs, aiming to simplify and improve the intuitiveness of their core concepts. They have replaced the name "solid" with "op", which better fits the concept of a functional unit of computation. The new API provides more concise definitions for Dagster Types and metadata on inputs and outputs. Additionally, pipelines are being reorganized into two new abstractions: graph and job. Graphs encapsulate the logical structure of dependencies, while jobs are executable specializations of graphs. These changes aim to improve the approachability and ergonomics of Dagster's APIs, making it easier for users to understand and work with them. The team encourages users to try out these new APIs and provide feedback to help shape the final product.