The latest version of Apollo Client, 2.0, brings a faster and more flexible experience while maintaining the API's familiarity. The new version introduces features such as modifiable request chains, custom data stores, and improved performance, with benchmarks showing speeds ranging from 2x to 5x faster than the previous version. The client is also smaller in size, reducing its footprint by around 40%. The updates enable users to create custom links for handling requests and caching, allowing for a wide range of new features and possibilities. With minimal changes required to upgrade, developers can take advantage of these improvements without significant rewrites.