Some important differences from 2019:

* Code is off of laptops and lives entirely on the dev server in many (but not all) cases. This has opened up a lot of use cases where devs can have multiple branches in flight at once.

* Big investments into bazel.

* Heavier investment into editor experiences. We find most developers are not as idiosyncratic in their editor choices as is commonly believed, and most want a pre-configured setup where jump-to-def and such all "just work".